Homework

There are two types of homework assignments in this course, online homework (which will be graded) and pen-and-paper textbook homework (which will not be graded).

Online Homework

Online homework will be done using MyStatLab. If you enrolled after the first day of classes, it might take a day or two before you make it into the system. Access MyStatLab through TritonEd.

Access Codes:  To get an access code for MyStatLab, you can either (1) purchase the textbook from the UCSD Bookstore, which comes bundled with a MyStatLab access code, or (2) purchase electronic access for one quarter only from the MyStatLab website. Instructions for purchasing electronic access can be found in TritonEd.

Syllabus Quiz:  The Syllabus Quiz is posted in MyStatLab. It has 10 question, each one multiple choice or True/False. You have one attempt per question. The quiz is "open syllabus," so you may have the syllabus open when you take the quiz. The Syllabus Quiz is due on the Friday of Week 1 and will be counted towards your homework grade. (One point per question for a total of ten points.)

Due Dates:  Online homework due dates are subject to change based on variations in course schedule or technological issues. All online homework assignments are due at 11:00 P.M., unless specified otherwise.

Late Submissions:  For each assignment, it is possible to submit online homework exercises after the Thursday due date, until the following Sunday at 11:00 P.M., but not for full credit. Late submissions earn a maximum of 80% of their total score. This penalty applies only to exercises submitted after the due date and not to those already submitted before the due date.

Exception:  Homework Zero may be submitted until the Friday of Week 2 without penalty. This is to accommodate the students that enroll in the class late. It is not possible to submit Homework Zero after the Friday of Week 2. (Homework Zero includes both the "Syllabus Quiz" and the "Chapter 0 Homework" assignment.)


Textbook Homework

These assignments will not be turned in and will be not graded; however, certain exam questions are based on textbook homework problems, so understanding the solutions to these problems should help you perform better on the exams. This page is subject to revision during the term. Please check regularly for updates. (Last updated 03 Jan 2019)

Please remember that you are expected to follow the Academic Integrity Policy when completing your homework.

Homework Zero     (Due Friay, Jan 11 at 11:00 pm—ONLINE ONLY)
  • Syllabus Quiz: This is a quiz about the syllabus. (See details above.)
  • Chapter 0 Homework: This is a set of problems intended to introduce you to MyStatLab and some of the features that you might encounter as you work through assignments in this course.

Reading:  The course syllabus.

Homework 1     (Due Thu, Jan 17 at 11:00 pm)
  • Chapter 3: 19, 23, 25, 26, 27, 45, 49
  • Chapter 4: 27, 29, 31, 32, 33
  • Chapter 5: 3, 4, 13, 15
  • Chapter 6: 19, 23, 27, 31, 33, 35, 45

Reading:  For this assignment, the relevant portions of the textbook are Chapter 3; Sections 4.1 - 4.3 of Chapter 4; Sections 5.1 and 5.2 of Chapter 5; and Chapter 7 (but you can skip the sections on Kendall's Tau and Spearman's Rho). I also suggest that you skim Chapter 1 and pp. 17-20 (Section 2.1) and p. 31 (Simpson's paradox) of Chapter 2.

Homework 2     (Due Thu, Jan 24 at 11:00 pm)
  • Chapter 7: 27, 35, 37, 39, 53, 59, 75   [In 37, assume correlation is positive.]
  • Chapter 8: 19, 25, 36, 39, 41
  • Chapter 9: 9, 11   [In 10, log is base 10 and ln is natural log (base e).]

Reading:  Chapters 7, 8, and 9.

Homework 3     (Due Thu, Jan 31 at 11:00 pm)
  • Chapter 13: 15, 27, 39, 41, 47, 49, 52   [In 41c, assume the disjoint events have nonzero probability.]
  • Chapter 14: 15, 17, 21, 27, 31, 35, 47, 49, 51, 53, 59

Reading:  Chapters 13 and 14.

Homework 4     (Due Thu, Feb 7 at 11:00 pm)
  • Chapter 15: 11, 19, 25, 31, 35, 37, 51   [In 35e, Y1 and Y2 are independent RVs with the same mean and SD as Y.]
  • Chapter 16: 19, 21, 25, 29, 31, 33, 37

Reading:  Chapter 15 (but skip Correlation and Covariance, pp. 399-400) and Sections 16.1 - 16.3 of Chapter 16.

Homework 5     (Due Thu, Feb 14 at 11:00 pm)
  • Chapter 16: 47, 48, 49
  • Handout (Continuous Random Variables): 1, 2, 3, 4, 5, 6, 7, 8

Reading:  Section 16.6 (the Poisson model) of Chapter 16 and the continuous random variables handout (available in TritonEd).

Homework 6     (Due Thu, Feb 21 at 11:00 pm)
  • Chapter 5: 9, 38, 43, 49
  • Chapter 11: 25, 27, 29, 41cd, 45
  • Chapter 15: 43, 45abc, 47
  • Chapter 17: 13, 27, 37, 49, 51, 55

Reading:  pp. 119-132 of Chapter 5; Chapter 11; Sections 16.4 (Approximating the Binomial with a Normal Model) and 16.5 (The Continuity Correction) of Chapter 16; and Chapter 17.

Homework 7     (Due Thu, Feb 28 at 11:00 pm)
  • Chapter 18: 13, 15, 21, 27, 31, 33, 35, 37
  • Chapter 19: 11, 13, 15, 21, 23, 35, 41

Reading:  Chapters 18 and 19. 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 Thu, Mar 7 at 11:00 pm)
  • Chapter 20: 15, 17, 19, 23, 25, 27, 41
  • Chapter 21: 15, 17, 19, 37, 39

Reading:  Chapters 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. 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 Thu, Mar 14 at 11:00 pm)
  • Chapter 22: 57, 59, 68, 72
  • Chapter 23: 9, 12, 13, 15, 17, 27abc

Reading:  Sections 22.5 and 22.6 of Chapter 22 (but you can skip "Tukey's Quick Test" and "A Rank Sum Test"); Chapter 23 (but you can skip "The Sign Test").

Homework 10     (No online homework.)
  • Chapter 25: 25, 35, 37, 39, 41, 43, 47, 49
  • Chapter 24: 11, 13, 15, 19, 39, 41, 47

Reading:  Chapter 25 (but you can skip 25.7 on "Logistic Regression") and Chapter 24.