Statistics 250H
Assignments

AssignedDue Assignment
Mon, Jan 7Wed, Jan 9 Read section 1.3 on histograms before class on Wednesday.
Wed, Jan 9Fri, Jan 11 Read: pp. 210-218 (don't get too bogged down with the few terms we haven't covered yet, such as variance. Variance is nothing but the square of standard deviation, so it's another measure of spread.)
Do: p. 219, #4.
Fri, Jan 11Mon, Jan 14 Do: p. 220, #10; p. 219, #2 (in addition to the 90% CI, also find a 99% CI).
Mon, Jan 14Wed, Jan 16 Read: pp. 186-189
Do: pp. 191-192, #8 and #10
Wed, Jan 16Fri, Jan 18 Read: pp. 262-264
Do: pp. 266-267, #8
Fri, Jan 18Mon, Jan 21 Read: pp. 267-269
Do: p. 269, #2 and #4
Mon, Jan 21Wed, Jan 23 Read: pp. 270-273, plus read Problem #7, p. 273
Do: p. 273, #2 and #6. Answer each question (a) using previous data and (b) without any prior knowledge.
Wed, Jan 23Fri, Jan 25 Read: pp. 227-229 and pp. 274-275
Do: p. 230, #6. Also, suppose that the study in #6 is conducted and we obtain p-hat=.538 and n=814. Compute a p-value for the test and interpret it at level alpha=.05.
Fri, Jan 25Mon, Jan 28 Read: pp. 278-286. Notice the differences and similarities between Section 8.5 and Section 8.6.
Do: p. 287, #2 and #5. In each, give a 95% confidence interval for the difference between the true proportions.
Mon, Jan 28Wed, Jan 30 Read: pp. 46-49 (Example 1.5.2 through sample range)
Do: Calculate, both by hand and using Minitab, the sample variance and standard deviation for the sample 11, 13, 14, 15, 16, 21. How do the answers change if you add 10 to each number? If you multiply each by 10?
Hints: Go to a PC lab somewhere and start Minitab. Type the sample into one column, say C1, with one observation per cell. Then select Basic Statistics...Display Descriptive Statistics from the Stat menu. Enter C1 in the Variables window and click OK. You can copy and paste your results into a word processor or print them out straight from Minitab. Print out your Minitab results, then use the same sheet to answer the questions by hand to save paper.
Wed, Jan 30Fri, Feb 1 Read: pp. 220-224 and pp. 230-235
Do: p. 225, #6. Give a p-value to answer the last question.
Fri, Feb 1Mon, Feb 4 Read: pp. 315-318
Do: p. 319-320, #2 and #4
Mon, Feb 4Wed, Feb 6 Read: pp. 290-292, pp. 302-305
Do: Minitab assignment 1
Wed, Feb 6Fri, Feb 8 Read: pp. 310-312.
Do: p. 312-313, #2 and #6 (the Smith-Satterthwaite approximations give df of 123 and 12, respectively)
Mon, Feb 11Wed, Feb 13 Read: pp. 80-85.
Do: p. 85-87, #4 and #10. In #4(e), give probabilities for all 16 paths if you can. In #10(c), explain how Mendel's first law is used in the answer.
Wed, Feb 13Fri, Feb 15 Read: pp. 88-89 and pp. 90-94.
Do: p. 94-95, #4 and #8 (Try to answer #4 with 5 persons--but don't construct a tree)
Fri, Feb 15Wed, Feb 20 Read: pp. 97-98 and pp. 99-100 (notice problem #9 on p. 99)
Do: As we discussed in class, there are 52 choose 5 or 2,598,960 different 5-card poker hands possible. There are nine categories of hands: Royal flush, straight flush, 4 of a kind, full house, flush, straight, 3 of a kind, 2 pair, and 1 pair (we won't consider the tenth category, which is none of the above). See (for example) http://www.pagat.com/vying/pokerrank.html#standard if you need an explanation of the hands. Your assignment is to demonstrate how to calculate the number of hands in each category.
Fri, Feb 22Wed, Feb 27 Read: pp. 111-114 and pp. 115-118.
Do: p. 114-115, #2 and #6; p. 119, #4
NOTE: I changed the deadline for this assignment.
Wed, Feb 27Fri, Mar 1 Read: pp. 128-131 and pp. 134-135 and p. 136, #9.
Do: p. 136-137, #8 and #10.
Fri, Mar 1Mon, Mar 11 Read: pp. 120-124 and pp. 137-141 and p. 125, #5 and #6.
Do: p. 141, #2 and #4 and pp. 126-127, #8 and #14. In #14, approximate the odds ratio in addition to the relative risk.
Mon, Mar 11Wed, Mar 13 Read: pp. 143-149
Do: p. 150-151, #4 and #8.
Wed, Mar 13Fri, Mar 15 Read: pp. 156-162
Do: p. 164, #8 and #10.
Fri, Mar 15Mon, Mar 18 Do: Practice Quiz #8
Mon, Mar 18Wed, Mar 20 Read: pp. 327-330
Do: Practice Quiz #9
Wed, Mar 20Mon, Mar 25 Read: Practice Quiz #10
Do: pp. 338-9, #2
Mon, Mar 25Wed, Mar 27 Read: pp. 341-344
Do: p. 350, #4. Use Tukey pairwise comparisons with family error rate 5%
Wed, Mar 27Fri, Mar 29 Read: None
Do: p. 339, #3. In addition to the questions asked, use both Levene's test and a residual plot to comment on the appropriateness of the ANOVA assumptions.
Fri, Mar 29Mon, Apr 1 Read: pp. 409-415 and pp. 418-420
Do: p. 415, #2, (a), (b), and (d) only (Interpret the p-value). Also, do p. 425, #2, (a), (b), and (c) only (Verify the equation in Definition 11.3.3, p. 412). Use Minitab for both questions!
Mon, Apr 1Wed, Apr 3 Read: pp. 398-403 (including Estimating an individual response)
Do: p. 406-7, #4 (a), (c), and (d).
Wed, Apr 3Fri, Apr 5 Read: pp. 426-430
Do: In the fall semester of 1999, a survey was given to over 200 people taking statistics 200. Assume that the people taking the survey are a representative sample of Penn State students (this is not a reasonable assumption; however, we make it here only for the purpose of this assignment). Download the survey data (save it, then load it into Minitab as a .txt worksheet). Read the survey questions, then answer the following questions by whatever means seem appropriate: Is there a statistically significant relationship between grade point average (question 18) and:
  1. living situation (question 7)
  2. hours studying per day (question 21)
  3. parties attended per month (question 57)
Fri, Apr 5Mon, Apr 8 Read: pp. 441-451
Do: p. 452, #4.
Mon, Apr 8Wed, Apr 10 Read: pp. 454-458
Do: p. 458, #2.
Wed, Apr 10Fri, Apr 12 Read: pp. 501-504, ignoring the stuff on Poisson distributions
Do: p. 470, #2 (a) and (b): In part (a), create a normal probability plot instead of a Lilliefors test and comment on the normality assumption. Also do p. 505, #2.
Fri, Apr 12Mon, Apr 15 Read: pp. 471-474 and pp. 477-480
Do: p. 481-482, #2 and #4.
Mon, Apr 15Wed, Apr 17 Read: pp. 483-485 and p. 486, Problem #5.
Do: p. 486, #4: Do this one by hand AND using Minitab (for Minitab, look under Stat...Nonparametrics...Mann-Whitney).


dhunter@stat.psu.edu