STAB22: An Introduction to Statistics

Summer 2012 

Ken Butler

Course outline
What Statistics and STAB22 is about
Ken's lecture notes .pdf .doc .odt (last updated Jun 26)
Lecture videos
MyStatLab and StatCrunch: what they are and how to access them

Intro to StatCrunch
Statistical tables
Old exams

Got a question? Read the FAQ first.
Graphic syllabus
Text and software
Where are my classes? Tutorial rooms and times can change without notice.
Contact us


If you are reading this, you have found your way to the summer 2012 STAB22 home page. Welcome!

Ken Butler (and daughter)

Use the links to the left to navigate, or to get in touch with us.

News is here

  • Aug 28, 5:00pm: I have submitted the final grades, and you will be receiving them via ROSI shortly. From here on, if you have any problems with your grades, you will have to take that up with the Registrar's office, who will explain your rights to you. I am not allowed to discuss or negotiate grades, or offer special consideration. If you ask me for special consideration, you are only showing your bad manners, and I cannot guarantee the politeness of any reply (insert emoticon here).

    I wish everyone a pleasant remainder of the summer, and hope you learned something from the course that will be helpful to you.

  • Aug 21, 10:30am: I am sitting in IC 404, and as I write, there are exactly two students here. (It got busier later.)
  • Aug 18, 10:30am: I forgot to give you the room allocation for the exam. It's by last name: A-R inclusive is in IC 130, and S-Z inclusive in IC 220. If you're writing a deferred exam, you're in IC 130.
  • Aug 17, 10:30am: I've scheduled myself for some office hours on Tuesday morning. TAs are on duty all day today (Friday) in IC 404. (It might get a bit busy in there today, since there is a calculus exam on Saturday.)
  • Aug 14, 11:00am: I'm relocating to my office.
  • Aug 14, 10:00am: I am in IC 404, or, depending how busy it gets, in my office IC 471, right now until 1:00pm. If you can't open the door to IC 404, use the "wheelchair" button. I have also scheduled myself for Thursday 3-5, and will be available sometime Monday and/or Tuesday next week as my schedule permits.
  • Aug 9, 1:00pm: link to the TA pre-exam office hours, including mine on Tuesday morning. This link is "live" and will be added to as the TAs pick their hours.
  • Aug 8, 12:30pm: TAs will be having pre-exam office hours in IC 404 (this is a correction) starting on Friday August 10. As of right now, Jon Balon will be there on Friday from 12:00 noon to 3:00pm.
  • Aug 6, 9:30am: I'm planning to be in my office on Wednesday August 8, 11:00am to 3:00pm, should you have questions. I intend to be around various times between now and the final exam, and the TAs will also be having office hours, which I will publicize here.
  • Aug 3, 11:30am: Sections you do not need to worry about for the final exam:
    • Segmented bar charts (chapter 3)
    • Correlation tables (chapter 7)
    • Plan B: Attack of the Logarithms (chapter 10)
    • Tree diagrams (chapter 15). I drew tables instead.
    • Bayes' rule (chapter 15) ditto. Use a table.
    • Correlation and covariance (chapter 16)
    • The Poisson model (chapter 17)
    • Finite population correction (chapter 18)
    • Plus Four confidence interval (chapter 19)
    • Large Sample Confidence Intervals based on normally distributed estimators (chapter 19)
    • The pooled t-test (chapter 23) and all the sections from Back into the Pool and Is there ever a time when assuming equal variances makes sense (inclusive). Read Determining the Sample Size, though.
    That's it. The only optional sections I included are ones relating to the sign test. If you're not sure about anything else, ask.
  • Aug 3, 11:00am: final exams from fall 2010 and fall 2011 are up on the old exams page.
  • Aug 2, 6:00pm: here are my notes from today. I'm hoping to get the 2010 and 2011 fall exams up soon.
  • Aug 1, 9:20pm: we've finished the course material (up to the end of Chapter 25). Thursday's class is a review / question-and-answer session. Bring your questions! (It's not being taped, so your chance to benefit from it is to be there.)
  • Jul 31, 6:00pm: MyStatLab exercises for Chapter 25 are up. Coming up later: a list of which sections you don't need for our final.
  • Jul 31, 5:00pm: chapter end exercises for Chapter 25: 1, 5, 7, 11, 15 (use software to find appropriate means and SDs), 23, 25. (On an exam I would give you means and SDs of the differences; I won't make you compute them.) Also, compare the exercises from Chapter 24, and make sure you understand why those exercises need to be treated as two independent samples, and the ones in Chapter 25 as matched pairs. Some of the Part VI review exercises starting on page 750 are useful: 1, 3, 5, 23, 33, for example. (Many of those test material from chapter 26, which we do not cover.)
  • Jul 31, 3:00pm: the TA Andi Kerenxhi will have extra office hours today in IC403 starting at 5:00pm.
  • Jul 26, 6:30pm: MyStatLab exercises from Chapter 24 are up. From the text: 1, 5, 7, 9, 11, 21, 23, 27, 31, 37. You can also practice the sign test by doing any of the hypothesis tests from Chapter 23 as tests on the median, and using the binomial table or normal approximation to obtain a P-value.
  • Jul 26, 5:30pm: lecture notes after today's class are up. Exercises to follow shortly (after I eat dinner!)
  • Jul 25, 10:00am: homework on MyStatLab from Chapter 23 is up. Chapter 23 questions: 1 (don't do (c)), 5, 7, 11, 13, 15, 19, 21, any odd-numbered exercise from 29-37 (do any tests as two-sided and follow up with a confidence interval if necessary). 37(e) is a sign test, which you'll be able to do after Thursday's class.
  • Jul 24, 6:00pm: forgot to mention that Quiz 10 contains questions on confidence intervals and hypothesis tests for a single proportion. The stuff, in other words, from chapters 19 through 21.
  • Jul 24, 4:30pm: today's lecture notes up. MyStatLab and chapter end exercises to follow tomorrow morning.
  • Jul 20, 10:00am: lecture notes and a rather horrific MyStatLab homework are now up. Some chapter-end exercises: chapter 20: 29, 31 (convert the experts' opinion to a proportion). Chapter 21: 1, 5, 7, 13, 15, 19, 29, 31 (use binomial table), 35. Chapter 22: 5 (are the two groups really independent?), 9, 13, 21 (do a two-sided test and follow up with a confidence interval if necessary), 25, 31.
  • Jul 19, 8:30pm: chapter-end exercises, MyStatLab exercises, lecture notes and quiz notes for next week are going up tomorrow morning.
  • Jul 18, 11:00am: Chapter-end exercises: chapter 19: 19, 23, 25, 29, 31, 37, 39, 41(a), 47 (use the information in 46). Chapter 20: 1, 3, 5 (careful!), 7, 9, 11*, 13, 17*, 21*, 23*. In the questions marked with a *, calculate the P-value based on a *two*-sided alternative, even if your H_A isn't, and if the P-value is small (here less than 0.10), follow up with a 90% confidence interval to show which side of the null the true p is, according to the data. My P-values are respectively 0.4642, 0.1147, 0.0556, 0.2152, with a confidence interval for the twins one of 0.008 to 0.027, so that the rate of twin births is *lower* for the young mothers.
  • Jul 18, 11:00am: MyStatLab homework from chapters 19 and 20 is up. (I had to add some hints to the Chapter 20 exercises because we do P-value calculations based on two-sided alternative hypotheses. But if you are purely asked for the hypotheses, I expect you to be able to produce a one-sided alternative if needed.)
  • Jul 17, 5:00pm: today's lecture notes are up; problems will be going up tomorrow morning, all being well.
  • Jul 14, 10:00pm: I made a mistake on page 212 of the notes. When n=10 and p=0.15, the probabilility of exactly 2 successes is 0.2759 not 0.1937, which is the entry for the next column over. The notes have been corrected accordingly and uploaded. (Thanks to the sharp-eyed student who spotted this!)
  • Jul 12, 5:30pm: next week's quiz, #9, will have one question about the binomial distribution (including possibly the sampling distribution of the sample proportion), and one about the sampling distribution of the sample mean.

    There is one more quiz, #10, which will undoubtedly include something about confidence intervals and hypothesis testing (which we start in on next week). There is no quiz (for credit) in the last week, but I will circulate a "quiz 11" to the TAs for everyone to work on, so that you get some practice on the material from the tail end of the course.

  • Jul 12, 5:00pm: MyStatLab "homework" is up. Some questions from the text: chapter 18 1, 3, 9, 11, 15, 17, 25, 29, 33, 37, 39, 47, 49. Chapter 19 3, 7, 13, 15, 17.
  • Jul 12, 4:30pm: today's lecture notes are up.
  • Jul 11, 3:00pm: ... or afternoon. Chapter end exercises from Chapter 17 are 23, 27, 29, 33, 35, 41, 45, 47. These and more are also up on MyStatLab.
  • Jul 10, 5:00pm: lecture notes with today's scribblings are up. MyStatLab problems and chapter end exercises are going up later tonight or tomorrow morning.
  • Jul 6, 10:30pm: Remember that Betty-and-Clara-go-swimming problem from the lecture? I showed you how to get the answer exactly, using the trick of looking at the difference between their times. But you can also do it by simulation in StatCrunch, like this.
  • Jul 6, 2:30pm: I've spent waaaay too much of today writing the StatCrunch report about the other class simulation. Here it is. Have a read. (If you log in you can have a play with my data.)
  • Jul 5, 5:30pm: I'm planning to a StatCrunch report about the simulation I never got to do in class today. Look out for it tomorrow, maybe tonight if I have any juice left.
  • Jul 5, 5:30pm: some problems are up on MyStatLab covering the end of Chapter 16 and the beginning of Chapter 17. Suitable problems from the text are: chapter 16: 27, 29, 31, 37, 39, 43, 45, 47, chapter 17: 1, 9, 11, 15, 19, 21. I think there are no calculations using the binomial model, only the geometric. A reminder that "expected value" is the same thing as the mean of a random variable.
  • Jul 5, 5:00pm: quiz 8 will cover conditional probability and independence, and the mean and SD of random variables.
  • Jul 4, 1:30pm: some exercises from the end of Chapter 16 for you to try, based on yesterday's class: 1, 5, 7, 9, 11, 15, 23, 25. These problems, and others, are also on MyStatLab.
  • Jul 3, 5:00pm: updated notes are up. Problems to work on are most likely going up tomorrow morning.
  • Jul 3, 12:30pm: to begin today's class, I want to do some more examples of the probability stuff, before moving on to Chapter 16.
  • Jul 3, 12:30pm: if you are in tutorial 5 (Nizanthan's) on Thursday, be warned that you will have a different TA this week!
  • Jun 25, 10:30am: the final exam date is, um, final: Tuesday August 21, 7:00-10:00pm, in IC 130 and IC 220.
  • Jun 21, 5:00pm, amended Jun 25, 10:30am: I've posted a rather horrific set of problems on MyStatLab from Chapters 14 and 15. I'm thinking that after we come back from the break, I might do some of them in the lecture. This kind of stuff benefits from (lots of) practice, and there are some tricks that often turn out to be useful. For example, there's a much simpler way of seeing the dish-breaking problem, the one that we finished with last week.
  • Jun 21, 4:30pm: I'll sort out the quizzes later, since we have time, but expect to see something from Chapter 14 and maybe 15. (We have technically finished Chapter 15 now, but I'd like to go over that last example again.) Chapter 14 exercises: 11, 13, 15, 17, 19 ("A but not B" is the same as "both A and not-B"), 23, 25 (think about the ways you can get a total of 2 or 3 or 12. It might help to label the dice as "red" and "green".) For some of these exercises (like 17 and 19), you might find it helpful to pretend that there are 100 households (homes, whatever) and make a table like the one in #23 or our law-school examples. Chapter 15: 1, 3 (assume independence), 5, 7 ("at least one" is the same as "not none"), 13, 17 (a deck of cards has 52 cards; 26 of these cards are red, 13 each of hearts and diamonds, and the other 26 are black, 13 each of spades and clubs). Each of the 13 cards in a suit has a "rank", Ace, 2 through 10, Jack, Queen and King.), 25, 29, 33, 37 (tricky), 39, 47 (like the one we did in class). Actually, any of the exercises here are good.
  • Jun 21, 2:00pm: next week (precisely, June 26 to July 2) is reading week. There are no lectures, tutorials or quizzes next week.
  • Jun 19, 4:30pm: more Chapter 13 exercises: 7-25 (the odd ones), 27, 29, 33, 37, 39, 45, 49. Chapter 14: 1, 3, 7, 9. The lecture notes from today are also up.
  • Jun 15, 12:00noon: A MyStatLab homework from chapters 12 and 13 is up. If you prefer to tackle exercises directly from the text: chapter 12: 23, 27, 31, 33, 35; chapter 13: 1, 3, 5. I haven't talked about blinding, placebo/control group and confounding yet, so if you should happen to run into those on MyStatLab, don't worry about them yet.
  • Jun 14, 10:30pm: Annotated answers to version 1 of the midterm are up. The other versions of the exam have the same questions and alternative answers, but in a different order.
  • Jun 14, 6:00pm: The next quiz (#6) will be on sample surveys and sampling, and on experimental design and observational studies: that is, chapters 12 and 13. I haven't quite finished Chapter 13 yet, but only the stuff we've done in class will be on the quiz.
  • Jun 14, 5:30pm: latest lecture notes are up; exercises and MyStatLab stuff will be up later/tomorrow, as the mood takes me.
  • Jun 13, 9:30pm: here are the midterm marks, out of 40. Before you go looking for yours, be sure to scramble your student number according to the instructions at the top of the exam results page. Check your calculations at least twice before you complain that you are not there. The median score, as I write, was 27/40 or 67.5%; Q1 is 23 (57.5%) and Q3 is 31 (77.5%). There were 5 people who scored 36 (90%) or more; special congrats to you.

    I am working on "annotated answers" to the exam (answers plus explanation), which I will post when it is ready. (That will be tomorrow or Friday.)

  • Jun 12, 6:30pm: Some problems from the end of Chapter 12: 1, 3, 7, 9, 11, 13, 15, 17, 21. I'll put a homework up on MyStatLab tomorrow morning.
  • Jun 12, 6:30pm: The exams are in the hands of Test Scoring, so we should have some results in the next couple of days.
  • Jun 7, 4:30pm: today's lecture notes, including the tidied-up histogram, are up. Quiz 5 will cover Chapters 9 and 10 (yes, there is a quiz next week). Some questions from Chapter 11: 1, 5, 7, 9, 11, 17, 19, 25, 33, 35. There is also a StatCrunch homework up.
  • Jun 6, 4:00pm: I forgot to mention that Quiz 4 covers scatterplots, correlation and regression, chapters 7 and 8 (but not 9 or 10 yet).
  • Jun 6, 1:00pm: the midterm exam covers chapters 1 through 11 from the text. You're responsible for any material in the text that appears in those chapters, with the exception of timeplots (chapter 5) and "Plan B: Attack of the Logarithms" in Chapter 10 (which I forgot to include). Also, I won't ask you to calculate a correlation by hand. We didn't do "Re-expressing Data: a first look" in Chapter 5, but we covered those ideas in Chapter 10.
  • Jun 6, 1:00pm: a Jun 5 homework is up on MyStatLab with some questions from Chapters 9 and 10.
  • Jun 5, 4:30pm: some chapter 9 problems: 1, 7, 11, 19, 25, 37; and from chapter 10: 5, 11, 13, 17, 25, 31, 37. A MyStatlab homework will go up tomorrow.
  • Jun 5, 1:00pm: here are the TAs' pre-midterm office hours, to be held in IC 404. Feel free to see any TA; you don't have to see "yours".
    Wed Jun 6  10:30-12:00 Danny 
               13:00-16:00 Rihong
    Thur Jun 7 10:00-11:00 Thomas
               12:00-14:00 Jon
               14:00-15:00 Samir
               16:00-17:00 Jon 
               19:00-21:00 Andi
    Fri Jun 8  10:00-12:00 Thomas
               11:30-14:30 Kevin
    Mon Jun 11 10:00-13:00 Nizanthan
               13:00-15:00 Samir
               15:00-16:30 Danny
    I am also planning to be around on Monday, probably in the afternoon.
  • Jun 4, 1:00pm: The midterm exam will cover whatever we get up to on Thursday, which I'm intending to be somewhere in Chapter 11.

    The exam has 40 multiple choice questions. A reminder that you are allowed one 8.5x11 inch sheet of notes, both sides, handwritten by you, and a calculator. The calculator may not be programmable and may not communicate with the outside world, so no cell phone calculators, even in airplane mode. Bring a #2 pencil for the Scantron sheet. A black pen will probably work, but is not guaranteed.

  • May 31, 5:30pm: I made a rather large homework on MyStatLab, having realized that I failed to put one up on Tuesday.
  • May 31, 5:00pm: some more chapter 8 questions: 27, 29, 35 (use StatCrunch, typing the data into an empty worksheet), 37 (do this one at the same time as 35), 41, 47, 51. You can also tackle Chapter 9 numbers 1, 3, 5.
  • May 31, 5:00pm: the lecture notes, incorporating today's additions, are now up.
  • May 31, 2:30pm: there is a (new) version of StatCrunch for suitably-equipped phones, here. Log in with the same ID and password that you regularly use.
  • May 29, 4:30pm: Some end-of-chapter exercises from Chapter 7: 5, 9, 11, 13, 17, 21, 25. From Chapter 8: 1, 5, 13 (read 7 first), 19, 27. I've put some problems on MyStatLab also. (Check the chapter 8 problems -- there might be some stuff we haven't done yet.)
  • May 29, 11:00am: Here's who is where for the midterm. It's according to last name:
    Last name  Room
    A-I        SW 128
    J-Patel    SW 309
    Phan-Z     SW 319
    These rooms are on the south campus. Reminder that the exam is Monday June 11, 5:00-7:00pm.
  • May 28, 8:00pm: Lecture notes updated (again), including specifically some more material from Chapter 8, which we'll be tackling tomorrow.
  • May 28, 11:30am: The midterm date is official. Specifically, Monday June 11, from 5:00-7:00 pm, in S128, S309 and S319. I will publicize (here) which room you need to go to as soon as it is worked out.
  • May 24, 6:00pm: there are some exercises from today's lecture on MyStatLab. Some exercises to try from the end of Chapter 6 are: 19, 23, and Chapter 7: 5, 7, 13, 15, 19, 21, 23, 35.
  • May 24, 5:30pm: Quiz 3 will be on: using the normal tables (forwards and backwards), the 68-95-99.7 rule, and normal probability plots. Take note of two things: in the old textbook, Table A was the normal table, so any lingering references in the quiz to Table A refer to your Table Z. Also, normal probability plots on the quizzes were produced with different software, and the variables ended up on the opposite axes. Take note of this if you're figuring out eg. direction of skewness.
  • May 24, 5:00pm: the updated notes (including the stuff I did on the document camera on bright yellow paper) are now up.
  • May 23, 4:00pm: I have now updated the notes to include some stuff I missed on Tuesday. Pages 64-66 are the ones to read before Thursday's class. Then we'll move on to Chapter 7.
  • May 23, 10:15am: I put a "homework" from Tuesday's class on MyStatLab. I also realized that I hadn't made the student solutions manual available to you guys, but it should be there now (see my 10:30 note from yesterday).

    Some questions from the end of Chapter 6: 1, 3, 5, 17, 21, 25 (|z|<0.5 means -0.5May 23, 10:00am: I've updated the lecture notes (see left). If you read ahead, you'll see that there's a gap corresponding to page 133 of the text, which I will fill in today.

  • May 22, 10:30am, amended 12:00noon: I had a request for some recommended chapter-end exercises. Here's what I have for chapter 5: 3, 5 (not (e), 9, 13, 15, 19(c) (which answers (b)), 27, 29, 33, 37. These all have answers at the back of the text (in Appendix A) and there are fully written-out solutions in MyStatLab. (Click on Chapter Contents, and the first item should be Student Solutions Manual.)
  • May 18, 11:30am: there is a new "homework" on MyStatLab, reflecting what we did in class yesterday. In one or two places, you're asked to calculate the "range", which is the difference between the highest and lowest values. The problem with the range, and the reason I didn't spend any time on it, is that it is very sensitive to unusually high or low values, even more so than the standard deviation.
  • May 17, 5:30pm: we have a tentative date for the midterm, which is Monday June 11. This date may change.
  • May 17, 5:30pm: quiz 2 will be on mean, median, IQR and SD and boxplots. You won't have to calculate a standard deviation.
  • May 17, 5:00pm: updated lecture notes uploaded.
  • May 16, 14:30pm: I added some links on the left: to the lecture-casting website, and to my document about MyStatLab and StatCrunch.
  • May 15, 6:00pm: the notes with annotations from today's class are up. I also uploaded an Open Office version of the notes, in case that's what you use.
  • May 15, 10:00am: Just in case things are confusing: Quiz 1 will be on types of variables, bar charts and pie charts, and the piece of Chapter 4 we covered last week (up to inter-quartile range).
  • May 13, 10:00pm: I realized that I missed out some of Chapter 3. I inserted some pages in the notes, which I will talk about on Tuesday. This stuff might be on quiz #2, but will not be on quiz #1. The relevant piece of the textbook starts on page 24. If you want to read ahead, that and the rest of Chapter 4 would be good to look at.
  • May 10, 8:00pm: I've made some "homework" on MyStatLab for you to try. "number one" is to get you used to the system, "number two" is stuff from Chapter 2, and "May 10" is stuff from today's class. You might need to read the textbook some to help you with the questions from Chapter 3. (I can't cover everything in class, y'know.)
  • May 10, 5:00pm: lecture notes, including today's scribbles, are now uploaded. We are now in the middle of chapter 4 of the text. Where we got to today is the cutoff for Quiz 1, next week (it doesn't matter if your tutorial is Monday or Friday; nothing from next Tuesday's class will be on this quiz).

    You may have noticed a cameraperson taping our lectures. This will continue throughout the semester. You can (re-)watch the lectures by going to the WebOption website and logging in the same way you'd log into the Intranet.

    The quiz format is this: two questions, worth 5 points each for a total of 10, requiring short answers. I devise all the quizzes myself and give the TAs my solutions. (Each tutorial gets a different quiz.) The quizzes are not meant to be difficult if you have kept up with the material.

  • May 8, 1:30pm: you will probably want to access MyStatLab and StatCrunch. Click here to find out how.
  • May 8, 11:30am: lecture notes up to Chapter 12 now done. I have also added a .pdf version (see left column).
  • May 6, 1:30pm: lecture notes up to Chapter 11 (as per textbook) are done.
  • May 2, 10:00am: my lecture notes are not quite complete yet, so expect gradual updates to what appears in the left-hand column as we go on. As of right now, up to about page 70 is good. We'll probably add things to the notes in class, so this document is likely to change as we go (even after I have "finished" it). I'll mark the last change date, so that you'll know how up-to-date your version is.
  • Apr 13, 10:45am: we have a new textbook.
  • Apr 13, 10:30am: Read this if you are having trouble getting into a tutorial.

Old news

  • Jan 6, 3:30pm: There was a mixup in getting the grades back from the test scoring people, but all is good now. I submitted the grades yesterday, after which they had to be approved by the department, and then go through the machinery at the Registrar's office to find their way onto ROSI. So the grades are on their way.

    A reminder that we are not allowed to discuss or negotiate grades. If you have any issues with the grade you have received, you need to take that up with the Registrar's office, not with us. You have rights which the Registrar's office can tell you about.

    There were three people who wrote their final exams at a different time because of conflicts. As I write, I do not know the marks of those exams. If you are one of those students, please ignore what appears on ROSI for the moment; I will make corrections once I have the marks.

  • Dec 15, 11:00am: Ken will be available in his office this afternoon (Thursday) from about 3:00, and can stay until about 5 (but may leave sooner if there is no-one there).
  • Dec 9, 2:00pm edited Dec 10 11:00am: Here are the TA office hours before the final:
    Srishta Chopra Friday, Dec 9, 11:00-13:30,
                  Monday, Dec 12, 13:00-14.30,
                  Wednesday, Dec 14, 14:00-15:30
    Kry Lui  Thursday (Dec 8th), 10:00 - 18:00
              Wednesday (Dec 14th), 12:00 - 16:30
    Jon Balon Wednesday the Dec 07,  15:00-17:00
    Andi Kerenxhi, Tuesday Dec 13, 14:00-18:00
    Hoi Suen Wong   Tuesday (Dec 13) 10:00 - 14:00
                    Wednesday (Dec 14) 10:00 - 12:00
    Christopher Chow Wednesday dec 7 12:00-15:00 and Monday Dec 12 11:00-13:00
    Kevin Yan  Dec 14, 17:30-19:00, 10:00-12:00 ,Dec 15, 13:00-14:30
    Zengxin Hong  Dec. 9, Friday 13:30-17:00
                  Dec. 12, Monday 14:30-17:00
                  Dec. 15, Thursday 9:00-13:00, 14:30-17:00
  • Nov 29, 11:30am: Ken's lecture notes from today are up: part 1 and part 2.
  • Nov 29, 9:30am: Stuff you don't need for the final exam:
    • Section 3.4, Ethics
    • Section 4.5, advanced probability rules
    • Section 6.4, Power of tests of significance
    • Section 7.3, More tests for distributions
    • Chapter 8 (inference for proportions) and beyond
  • Nov 25, 1:00pm: The final examination is on Fri Dec 16th at 9:00am in the Gym. It is a 3-hour examination covering the whole course. Information and regulations for the final exam are elsewhere on this website.
  • Nov 25, 12:30pm: Ken's lecture notes from today, and the extra reading that we didn't get to in class today. Tuesday's class, the last lecture, will be a kind of highlight reel of the t procedures in Sections 7.1 and 7.2. We're not doing: power of tests of significance (6.4), section 7.3, or any of chapter 8.
  • Nov 18, 12:00pm: Don't forget to complete your evaluation of this course, on the Intranet. This is your chance to have your say about what you liked or didn't like about the course, and how you think it could be improved.
  • Nov 16, 5:00pm: I forgot to mention that quiz 10, the last one, will cover random variables (sections 4.3 and 4.4) and the sampling distribution of the sample mean (section 5.1).
  • Nov 15, 1:00pm: the StatCrunch report illustrating Question 2 from lecture 17 is here.
  • Nov 15, 9:30am: the StatCrunch report illustrating Question 1 from Lecture 17 is here.
  • Nov 11, 12:30 pm: the notes from Ken's class today are here. Part of it refers to a StatCrunch report which is here.
  • Nov 9, 1:00pm: Quiz #9 will cover probability up to the addition and multiplication rules (and, therefore, independent and disjoint events also). If you're in Srishta's tutorial that got disrupted, you'll be a week behind on quizzes the rest of the way. There are 10 quizzes altogether; your worst quiz mark gets dropped. (As of this moment, there are six lectures to go.)
  • Nov 3, 7:30pm: As promised, the version of the exam with explanations as well as answers. (This is actually the White version, but the other versions had all the same questions, but rearranged a bit.)
  • Nov 2, 12:30 pm: Here are the versions of the exam, with answers: white, pink, green and blue.
  • Nov 2, 11:00 am: Midterm marks are up. The exam is out of 37. Median mark was 25 (67.5%), Q1 was 20 (54%), Q3 was 29 (78%).

    This exam was a little more difficult than usual, so we have decided to give everyone a bonus of 2 points (out of 37). The link shows the actual numbers of questions correct (you can count them), so the 2-point bonus will be added on to what you see there. For example, if you scored 27 out of 37, the midterm contribution to your overall grade will be 29/37=78%. As a rough guide to letter grades: above Q3 is A, between median and Q3 is B, between Q1 and median is C, below Q1 is D or F. That is to say, if you perform about the same relative to the rest of the class on the final exam, that is the kind of grade to expect. But you still have to produce that performance!

    If you see any problem with your Scantron being improperly read, let me know (e-mail) with your name and student number, but I won't be able to do anything about it until I see the original Scantrons (Friday or later).

    Coming later (up now) are "annotated answers" (with my comments) to one of the versions.

  • Nov 2, 11:00 am: Quiz #8 will cover the rest of Chapter 3: that is, sampling (3.2) and "toward statistical inference" (3.3).
  • Oct 25, 12:00pm: yes, there is a quiz #7. It will cover: the question of causation (section 2.6), intro to collecting data (the start of chapter 3) and experimental designs (section 3.1). There is nothing from Section 3.2 on quiz #7, but there *is* stuff from there on the midterm exam, so make you read that section of the textbook before the exam.
  • Oct 25, 11:00am: Apologies from Ken to those in the back who couldn't hear me very well today.
  • Oct 25, 8:30am: Here's which room to go to for the midterm exam:
    Last name begins withGo to room
    A-IAA 112
    J-WAC 223
    X-ZH 214
  • Oct 24, 12:30pm: the pre-exam help schedule is updated, as shown in the table in October 20th's second entry.
  • Oct 24, 12:30pm: FSG update: Reza has put handout 5 and handout 6 online. (You may, or may not, need to log in to the Portal to see them.)
  • Oct 21, 8:30 am: FSG update - the time and location have changed, as follows:
    Day        Time            Place
    Monday     15:00-16:00     Portable 04, room 101
    Friday     11:00-12:00     Portable 04, room 101
  • Oct 20, 10:30 am: the midterm covers everything up to the end of section 3.2 in the text (sample surveys). We're aiming to have the lecture on Oct 28 be a question-and-answer session, so think about what questions you'd like to ask.
  • Oct 20, 12:00pm updated 6:30pm, updated again Mon Oct 24 12:30: Extra help before the midterm is as below, in IC 404 unless stated:
    TimeFri Oct 21Mon Oct 24Tue Oct 25Wed Oct 26Thu Oct 27Fri Oct 28
    9:00-10:00 ZengxinSrishta Srishta, Jon 
    10:00-11:00SrishtaZengxinHoi Suen Jon Srishta
    11:00-11:30Srishta Christopher    
    11:30-12:00  Christopher (IC 404), Ken (IC471)    
    12:00-1:00Christopher Hoi Suen (IC404), Ken (IC471)  Jon, Christopher 
    1:00-2:00Jon, Christopher Ken (IC471)Kevin   
    2:00-3:00Jon  Kevin   
    3:00-4:30    Kevin  
    4:30-5:00 Andi   Kevin 
    5:00-6:00 Jon, Andi     
    6:00-6:30 AndiAndi    
    6:30-8:00 Hoi SuenAndi    
  • Oct 18, 1:30pm: quiz #6 will cover R-squared, residuals and contingency tables (ie. sections 2.4 and 2.5 of the text). Yes, I'm aware that some people haven't written quiz #5 yet! Just so that you know when you come to it.
  • Oct 14, 9:30am: Reminder: the midterm is Friday October 28, 3:00-5:00pm, in AC 223, AA 112 and H 214.
  • Oct 12, 9:30am: Tutorial 15 has moved from MW 223 to PO 101, effective immediately. (PO 101 is one of the portables on the former games field next to the Science wing.)
  • Oct 12, 9:00am: I just added a section to the FAQ about exams. See item #6.
  • Oct 12, 8:30am: quiz #5 will cover scatterplots, correlation and regression basics (ie. sections 2.1, 2.2 and 2.3 of the text). Those folks with a Monday tutorial will do quiz #4 next week.
  • Oct 7, 11:30am: in case it's not clear, there are no tutorials on Monday. Those of you in Monday tutorials will be a quiz behind everyone else the rest of the way. The last quiz will be on Mon Nov 28, and there is an extra tutorial (to make up for the one missed) on Thu Dec 1. This is for tutorials 1, 3, 4 and 16 only. The rest of you will proceed as usual, with the last quiz in the week of Nov 17-Nov 23 and one more tutorial after that. The yellow and green stripey schedule at the bottom (waaay down) explains everything.
  • Oct 4, 2:30pm: Quiz #4 will feature the normal distribution: the 68-95-99.7 rule, using Table A to get proportions from values and values from proportions, and the normal quantile plot. (Note: the normal quantile plots on the quizzes come from different software. The principal effect of this is that sometimes the data and the "normal quantiles" are on the opposite axes to what we are used to.)
  • Oct 4, 2:30pm: thanks to a student who helped me figure out that there was something up with the textbook data sets link for the 6th edition. This is now fixed.
  • Sep 30, 12:00pm: The midterm date is apparently confirmed: it is Friday October 28, 3:00-5:00pm. (The actual exam will be 1 hour 45 minutes long to ensure the rooms are ready for the exams after us.) The exam is in AA112, AC223 and H214. We'll tell you later which room you need to go to.
  • Sep 28, 1:00pm: I've uploaded the data disks from the text (6th and 7th editions), in case you are having trouble accessing it. To get a particular data set, navigate to it (using the link to the left), then Open StatCrunch, select Load from Web Address, and copy and paste the URL of your data set into the box.
  • Sep 28, 12:30pm: The midterm date is not confirmed yet; I will put a note here once it is official (and announce it in class). Expect it to be near the end of October.
  • Sep 28, 11:00am: Quiz #3 will cover: boxplots, assessing outliers using the rule based on the IQR, changing the unit of measurement (linear transformations) (at the end of section 1.2), using Table A to obtain proportions from z-values.
  • Sep 23, 1:30pm: The extra notes from Ken's lecture are here.
  • Sep 22, 3:30pm: The Facilitated Study Groups will be conducted by Reza Nabavizadeh. They will meet twice a week, as below:
    Tuesday13:00-14:00AC 219
    Friday11:00-12:00Portable 04, room 101
  • Sep 20, 6:30pm: Quiz 2 covers stemplots, histograms, centre, spread and shape (especially shape), mean and median, when you might use which, and how you might figure out the median from a histogram or stemplot. (Mahinda's section hasn't done boxplots yet, so they will probably appear on the next quiz.) This is lecture 3 and 4, basically.
  • Sep 20, 8:30am: I learned how to do a report in StatCrunch. For Ken's students, it's a rehash of part of Lecture 3.
  • Sep 18, 3:00pm: your quiz marks will appear on the Intranet. (If you already wrote your quiz, your mark might be there already.)
  • Sep 18, 3:00pm: somebody left a notebook in Srishta's tutorial. If it is yours, see Srishta or drop me (Ken) an e-mail.
  • Sep 17, 9:30pm: You should find in your e-mailbox a message about Facilitated Study Groups. These are collaborative weekly structured study groups for our course. They are entirely optional. The first stage is to find good times for everyone who wishes to participate. For that, you'll need to access the course Blackboard page and complete the survey there. (There is nothing else on the course Blackboard page, since I'm not using Blackboard.)
  • Sep 14, 12:00pm: I have edited the textbook page to express my opinions on using the 6th edition vs. the 7th of the textbook. In summary: if the 6th edition is what you have, that'll be OK.
  • Sep 13, 12:00pm: Quiz #1 is coming up. The quizzes will consist of two short-answer questions worth 5 points each, and will be marked by your TA. Quiz #1 will cover types of variable (categorical, quantitative), bar charts and pie charts. This is true whether your quiz is on Thursday this week or Wednesday of next week. The folks late in the tutorial week will get extra time to study, or (depending on your point of view) more time to forget what they learned.
  • Sep 9, 12:00pm: A Powerpoint giving an intro to StatCrunch is over on the left, below the links to my lecture notes.
  • Sep 9, 11:30am: Ken's lecture notes have a "to read for next time" slide on the end of each lecture, which I forgot to get to today. Thus, if you're in Ken's section, take a look at slide #19, and look through the appropriate bits of the textbook before Tuesday. That way, we can get down to business next time.
  • Sep 6, 1:00pm: I know it's very confusing having a semester start on a Thursday, so I thought I would make a table (below) showing what is happening on which day. There is an additional complication that Mon Oct 10 is Thanksgiving Day, on which there are no classes, and the last Thursday of the semester is a "makeup Monday" for people who would have had a tutorial on Oct 10.

    Calendar for STAB22, Fall 2011

    Mon Tue Wed Thu Fri
    Sep 5 Sep 6 Sep 7 Sep 8 Sep 9
    lecture #1
    Sep 12 Sep 13
    lecture #2
    Sep 14 Sep 15
    quiz #1
    Sep 16
    lecture #3
    quiz #1
    Sep 19
    quiz #1
    Sep 20
    lecture #4
    quiz #1
    Sep 21
    quiz #1
    Sep 22
    quiz #2
    Sep 23
    lecture #5
    quiz #2
    Sep 26
    quiz #2
    Sep 27
    lecture #6
    quiz #2
    Sep 28
    quiz #2
    Sep 29
    quiz #3
    Sep 30
    lecture #7
    quiz #3
    Oct 3
    quiz #3
    Oct 4
    lecture #8
    quiz #3
    Oct 5
    quiz #3
    Oct 6
    quiz #4
    Oct 7
    lecture #9
    quiz #4
    Oct 10
    no classes
    Oct 11
    lecture #10
    quiz #4
    Oct 12
    quiz #4
    Oct 13
    quiz #5
    Oct 14
    lecture #11
    quiz #5
    Oct 17
    quiz #4
    Oct 18
    lecture #12
    quiz #5
    Oct 19
    quiz #5
    Oct 20
    quiz #6
    Oct 21
    lecture #13
    quiz #6
    Oct 24
    quiz #5
    Oct 25
    lecture #14
    quiz #6
    Oct 26
    quiz #6
    Oct 27
    quiz #7
    Oct 28
    lecture #15
    quiz #7
    Oct 31
    quiz #6
    Nov 1
    lecture #16
    quiz #7
    Nov 2
    quiz #7
    Nov 3
    quiz #8
    Nov 4
    lecture #17
    quiz #8
    Nov 7
    quiz #7
    Nov 8
    lecture #18
    quiz #8
    Nov 9
    quiz #8
    Nov 10
    quiz #9
    Nov 11
    lecture #19
    quiz #9
    Nov 14
    quiz #8
    Nov 15
    lecture #20
    quiz #9
    Nov 16
    quiz #9
    Nov 17
    quiz #10
    Nov 18
    lecture #21
    quiz #10
    Nov 21
    quiz #9
    Nov 22
    lecture #22
    quiz #10
    Nov 23
    quiz #10
    Nov 24
    no quiz
    Nov 25
    lecture #23
    no quiz
    Nov 28
    quiz #10
    Nov 29
    lecture #24
    no quiz
    Nov 30
    no quiz
    Dec 1

    no quiz
    Dec 2
    end of classes
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