• MA223 Home
• MA223 Homework and Handouts
• MA223 Guidelines and Policies
• Fun Statistics Links

Homework Assignments

• Homework 1: Due Tuesday 3/13/08: Read sections 1.1, 1.2, 1.3, 1.4, and 1.6 in the text (read only the material concerning the Binomial distribution in 1.6). Do and turn in problems
  • Section 1.2: 16, 17.
  • Section 1.3: 20, 24.
  • Section 1.4: 30, 36, 38.
  • Section 1.6: 52, 54.
  Make use of Minitab for the problems in 1.2. You do not need to print out all the Minitab code or data, just (for example) the histogram you obtain (try to save paper, e.g., print 2-up). For the problems in 1.4 get used to using the table on page 560-561, and standardizing non-standard normals. We'll also have a short quiz (15 minutes) on this at the end of class! Here is the key to Quiz 1.
• Homework 2: Due Tuesday 3/20/12: Read sections 2.1 to 2.4. Do and turn in
  • Section 2.1: 2, 4, 10.
  • Section 2.2: 15, 16, 26.
  • Section 2.3: 32, 36.
  • Section 2.4: 44, 46. For 46 you can use this Maple notebook. For fun, here is the file containing the popcorn times.
  As usual, use Minitab when appropriate, but do small (less than 15 observations) computations by hand! We'll also have a quiz over this material on Tuesday. Here is the key to Quiz 2.
• Homework 3: Due Monday 3/26/12: Read sections 3.1 to 3.3, 4.1, and this data acquisition handout; we've talked about a lot of the stuff in the handout during class, but this gives a summary of the ideas. Do and turn in
  • Section 3.1: 2, 4.
  • Section 3.2: 10, 14, 16.
  • Section 3.3: 18, 22.
  • Section 4.1: 2.
  Here is a proof of the sum of squares formula on page 119.
• First Exam will be on Tuesday March 27! Some suggested review problems for the first exam: 60, 61, 68, 70 in Chapter 1, 54, 57, 61, 64 in Chapter 2, 44, 47, 48 in Chapter 3. You may also wish to review this handout on the IID assumption that we talked Here is the key to Exam 1.
• Homework 4: Due Thursday 4/12/12: Read sections 5.1 to 5.4 in the text, as well as this handout on random variable algebra (but you can skip the appendix and optional part if you like). Do and turn in:
  • Section 5.1: 4
  • Section 5.2: 8 and 10
  • Section 5.3: 12, 16, 20, and 22.
  • Section 5.4: 30 and 38.
  We'll also have a short quiz over this material! Here is the key to the quiz.
• Homework 5: Due Tuesday 4/17/12: Read sections 5.5, 5.6, Do and turn in problems
  • Section 5.5: 44
  • Section 5.6: 50, 52
  • Section 7.1: 2
  • Section 7.2: 8, 10, 14
  There will also be a short quiz in which I'll ask you to find a confidence interval for the mean of a random variable given some sample statistics. Here is the key to the quiz.
• Here is the key to the handout from Tuesday April 17.
• NEXT EXAM is Tuesday 4/24/12. Here is the key to the practice problems from class on Monday 4/23/12. And here is the key to the exam.
• Homework 6: Due Tuesday 4/24/12: Read sections 7.3, 7.4 (skip pages 317 to 319), 7.5. Do and turn in the following (this material will appear on the exam!)
  • Section 7.3: 24, 30.
  • Section 7.4: 36, 38, 40.
  • Section 7.5: 46, 52, 54.
• Homework 7:, due Tuesday 5/1/12: Read that portion of 7.6 that deals with bootstrap methods. Also read sections 8.1 and 8.2. Do and turn in the following problems:
  • A random sample of size 14 of an exponential random variable (density as on page 29) yielded data 1.68, 0.55, 0.36, 0.08, 0.49, 0.32, 1.20, 1.23, 1.25, 1.33, 1.00, 0.71, 0.39, 0.48. Use the bootstrap technique to obtain a 95 percent two-sided confidence interval for the mean (which is 1/lambda). This Maple notebook may be helpful, or you can use the "bootmean" macro you installed for Minitab.
  • Section 8.1: Do 2, 4, 10,
  • Section 8.2: Do 18, 28, 36.
  We'll have a brief quiz Tuesday! Here is the key to the quiz.
• Here is the key to the practice problems from class on Monday 4/30.
• Here is the key to the practice problems from class on Friday 5/4/12.
• Homework 8:, due Tuesday 5/8/12: Read section 8.3 and my chi-squared handout. Read pages 382 to 384 in 8.4, and page 388 in 8.5. Do and turn in
  • Problems 42, 44, 46 for section 8.3
  • Problems 48 to 51 for section 8.4 (practically mental computations).
  There will be a short quiz too! Here is the key to the quiz.
• Homework 9:, due Monday 5/14/12: Read my ANOVA handout and sections 9.1 and 9.2 (duplicates ANOVA handout somewhat). Do problems 10, 14, 16, 22 in chapter 9, and turn these in. In doing the ANOVA on 16 and 22 try to assess the assumptions of equality of variance and normality, using Minitab of course. No quiz, but this material will appear on the the next exam on Tuesday 5/15.
• Here is the key to the ANOVA practice handout from 5/11/12.
• TEST Tuesday 5/15/12. The exam will cover hypothesis testing (sections 8.1 to 8.3, and my chi-square handout) and ANOVA (sections 9.1, 9.2, my handout). Suggested review problems are the odds (or evens) on pages 396 to 400 and pages 429 to 431. Expect to see a hypothesis test for a single mean, two means (maybe large sample, maybe small), a paired test, and an ANOVA. Plus some general nonsense on hypothesis tests. No Minitab, but no massive computations either. Bring a calculator. Here is the key to the exam.
• Homework 10: Due by Monday 5/22/12, not to turn in. Read pages 488 to 495 in section 11.1 and pages 501 to 504 in section 11.2 Do
  • Section 11.1: 1 to 5 odd.
  • Section 11.2: 9 to 15 odd.
• Here is the key to the Review Problems from Thursday 5/17.
• Here is the data for Part II of the final exam.