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## Online Homework

Online homework will be done through MyStatLab, a service offered by Pearson Higehr Ed., the publisher of our textbook. All versions of the book (in the bookstore) come bundled with MyStatLab; however, electronic access to the textbook comes with MyStatLab, so you can register for MyStatLab without buying the book if you want electronic access to the book only.

To register for MyStatLab, follow the link and register using the course ID bowers86051.
(You must use your UCSD email in order to receive credit for the online homework.)

Having trouble registering for MyStatLab?   Contact Pearson Student Support at this link.

## Written Homework

You should turn in your homework assignments by dropping them off in your TA's homework dropbox, which is in the basement of Applied Physics and Mathematics (AP&M), before 5:00 PM on the due date. Please write the time of your section at the top of your homework.

Please work carefully, and show the steps in your calculations, not just the final answer. Your solutions will be graded both for completeness and correctness. Because the department has limited resources available for homework grading, only a few handwritten problems will be assigned each week.

Odd-numbered problems will rarely be assigned because full solutions appear in a student's solutions manual. Even-numbered, end-of-chapter problems are typically similar to the preceding odd-numbered problem, so you are encouraged to work the preceding odd-numbered problem first and check your answer to make sure you are on the right track.

## Textbook Exercises   (Updated 19 Apr 2013 — Announced "Turn in" problems for HW8 and HW9.)

The notation "5.20" means "Chapter 5, Exercise 20".
The letter "R" means "Review".

Homework 1     (Due Wed, Apr 10)
• Chapter 4: 12, 16, 17, 18, 20ab, 36, 42
• Chapter 5: 16, 20, 21, 22
• Chapter 6: 4, 6, 12
• Chapter 7: 12, 16, 20, 23, 24, 26, 38ab

 Turn in:  4.20ab, 5.20, 6.12, 7.20, 7.24

 Reading:  For this assignment, the relevant portions of the textbook are Chapter 4, pp. 80-88 of Chapter 5 (stop before the section on Timeplots), pp. 109-117 of Chapter 6, and Chapter 7 (but skip the sections on Kendall's Tau and Spearman's Rho). I also suggest that you skim the very short Chapters 1 and 2, and pp. 18-22 (not including Contingency tables) and 32-33 (Simpson's paradox) of Chapter 3.

Homework 2     (Due Wed, Apr 17)
• Chapter 8: 14, 22, 24, 26, 39, 46, 62   [In 24, assume correlation is positive.]
• Chapter 9: 22, 24, 6, 12, 27
• Chapter 10: 6, 8   [In 6, log is base 10 and ln is natural log (base e).]
• Review of Part II: 2, 10, 18ad, 26, 40   [In 40, you may assume log is base e.]

 Turn in:  8.22, 8.46, 9.6, R.10, R.40

 Reading:  Chapters 8, 9, and 10.

Homework 3     (Due Wed, Apr 24)
• Chapter 14: 8, 20, 30, 32b, 34, 40, 42, 44
[In problem 34c, you may assume the disjoint events have nonzero probability.]
• Chapter 15: 2, 4, 8, 14, 18, 20, 22, 34, 36, 38, 40, 46
• Review of Part IV: 6, 32, 42b

 Turn in:  15.38, 15.46, R.6, R.32, R.42b

Homework 4     (Due Wed, May 1)
• Chapter 16: 4b, 12, 18, 24, 28, 30, 44   [In problem 28e, X1, X2, and X3 are independent random variables with the same mean and standard deviation as X.]
• Chapter 17: 10, 12, 16, 20, 22, 28abc
• Review of Part IV: 16bc, 20, 28ab

 Turn in:  16.30, 17.28abc, R.16bc, R.20, R.28ab

 Reading:  Chapter 16 (but skip Correlation and Covariance, pp. 395-396) and pp. 404-412 (not including "Normal model to the rescue") of Chapter 17.

Homework 5     (Due Wed, May 8)
• Chapter 17: 38, 40
• Review of Part IV: 38
• Handout: 1, 2, 3, 4, 5, 6, 7, 8, 9

 Turn in:  Handout Problems 1-9

 Reading:  pp. 414-416 (Poisson model) of Chapter 17 and this  handout of continuous random variables .

Homework 6     (Due Wed, May 15)
• Chapter 6: 32, 38, 40, 46bc
• Chapter 12: 18abc, 20, 24abd, 28, 32cd
• Chapter 16: 36, 38, 40
• Chapter 18: 16, 24, 28, 38, 40, 44, 50
• Chapter Review of Part IV: 4, 10

 Turn in: 12.24abd, 12.32cd, 16.40, 18.40, 18.50, R.10

 Reading:  pp. 116-133 of Chapter 6, Chapter 12, pp. 412-413 (Normal model to the rescue) of Chapter 17, and Chapter 18.

Homework 7     (Due Wed, May 22)
• Chapter 19: 6, 8, 14, 20, 24abc, 26, 28a, 30ab
• Chapter 20: 2, 4, 6, 12, 14abcd, 26, 32
• Chapter 21: 4, 6, 8, 26, 28
• Review of Part V: 32ab, 34

 Turn in:  19.6, 19.26, 20.14abcd, 21.28, R.32ab, R.34

 Reading:  Chapters 19, 20, and 21. Note: for hypothesis testing problems, you must show how you calculated your test statistic. You do not need to show work for the step of going from the test statistic to the p-value, as this step comes from tables or a calculator. You should always write a concluding sentence in which you explain your conclusion in the context of the problem.

Homework 8     (Due Wed, May 29)
• Chapter 23: 6, 8, 10, 14, 17, 26, 28, 30abdef, 34
• Chapter 25: 2, 4, 6, 8, 10, 20
• Review of Part VI: 40ab

 Turn in:  23.26, 23.28, 25.6, 25.20, R.40ab

 Reading:  Chapters 23 (but skip "The Sign Test" on pp. 566-568) and Chapter 25 (but skip "The Sign Test Again?" on p. 621). Note: for hypothesis testing problems, you must show how you calculated your test statistic. You do not need to show work for the step of going from the test statistic to the p-value, as this step comes from tables or a calculator. If you are using tables rather than a calculator, it is OK just to report an interval containing the p-value. You should always write a concluding sentence in which you explain your conclusion in the context of the problem.

Homework 9     (Due Wed, Jun 5)
• Chapter 24: 8, 10, 16, 20, 30
• Chapter 27: 8, 18, 20, 22, 24a, 26, 30, 32, 42abcde
• Review of Part VI: 25

 Turn in:  24.8, 24.30, 27.18, 27.20, 27.22

 Reading:  pp. 580-592 of Chapter 24, and Chapter 27 (but skip "Logistic Regression" on pp. 693-697).

Homework 10     (No handwritten problems are turned in, but there are online problems.)
• Chapter 26: 1, 3, 5, 9, 29bcde, 31, 37