Projects
To download a file, RIGHT click on the file name.
Number  Additional Information  Key  Due Date 
1  Project 1, a1.sas, a2.sas, a3.sas, a4.sas, a5.sas, a6.sas, a7.sas, a8.sas, a9.sas, a10.sas, a2.dat, a4.dat, Ex.2.2.4.dat, Ex2.5.3.dat 
Key

Friday Oct. 12 
2  Project 2, b1.sas, b2.sas, b3.sas, b4.sas, b5.sas, b6.sas, b7.sas, b8.sas, b9.sas, b10.sas, b11.sas, b12.sas, b2.dat, b3.dat, b4.dat, b6.dat, b7.dat, b8.dat, b9.dat, b10.dat, radishf.dat, radishall.dat, wloss.dat, rannum.dat, plover.dat, fitness.dat, birch.dat, fungus.dat 
Key

Friday Dec. 8 
Homework
All updates will be in red. The end of each assignment will be indicated by a 
If a problem requires work, it must be shown to receive credit.
Homework  Problems  Key  Due Date 
1 
#1: "In Example 1.2.2, the book mentions 'outliers' as a problem in studies.
If you removed the outliers from the data of homosexual men, would the results be as conclusive as before?
Why or why not?", 1.2.5 (Please state why or why not.), 1.2.7ab, 1.2.8, 1.3.1, 1.3.5, 2.1.4,
2.2.5, #2: "Describe the shape of the distribution in 2.2.5."


Key 
Aug 31 
2 
2.3.7, 2.3.8, 2.3.9, 2.4.3, #3: "Using the data in Exercise 2.6.6
for the BEFORE blood pressure, a) calculate the mean and standard deviation, b) calculate the median and
interquartile range, c) calculate the coefficient of variation.", 2.6.7,
2.6.11, 2.6.12, 2.7.2, 2.7.4 

Key

Sept. 7 
3 
#3 "In Exercise 3.2.1,
Find the probability that the number of tail vertebrae in a fish randomly chosen from the population
(a) equals 22, (b) is at least 22, (c) is no more than 22", 3.2.2, 3.2.7 

Key

Sept. 14 
4 
3.3.3, 3.3.4, 3.4.1, 3.5.7, 3.5.8,
3.6.1, 3.6.3, #4. "For the data in 3.6.3, what are the
mean and standard deviation for the sample?" 

Key 
Sept. 21 
5 
4.3.9, 4.3.10, 4.3.11, 4.4.2, 5.1.3 , 5.2.8 , 5.2.9, 5.2.14,
5.4.10, #5: "In 5.4.10, do the problem using
the normal
approximation without the continuity correction." end of material
for Midterm 1 

Key 
Sept. 28 
6 
6.2.2, 6.2.7, 6.3.5, 6.3.6, 6.3.7, 6.3.9, 6.3.12, 6.3.15,
#6: "Using the information in 6.3.12,
a) calculate the lower confidence bound at a 95% level, b) Interpret the confidence interval you
found in part (a) [similar to part b) of 6.3.12].", 6.4.1 (replace 'standard error of the mean' to
margin of error; that is, w = 5kg. In part b, do NOT perform any calculations.),
6.5.2a, 6.5.3, 6.5.4, 6.6.8, 6.7.4,
#7: "In Exercise 6.7.4, a) Does biofeedback change
systolic blood pressure? Why or why not?, b) Would the 99% confidence interval
be larger or smaller than the 95% confdience? Why or not? c) If we decreased
the sample size to n_{1} = 50 and n_{2} = 60, would the confidence
interval be larger or smaller? Why or why not?", 6.7.5, 6.7.8
(in part c, please include your explanation) 

Key 
Oct. 12 
7 
7.1.1, Peform steps 1  5 on the following problems (step 1 is optional):
7.2.5, 7.2.9 

Key 
Oct. 19 
8 
For all hypothesis test questions: Please follow the 9 (8) steps given in lecture.
7.2.4 (answer is yes or no and why, additional work is required for parts c and d, this is not a
hypothesis test), 7.2.8ab (in part a, use all 9 (8) steps), 7.2.10 (in part a, use all 9 (8) steps),
7.2.14, 7.2.15e, BONUS: finish the hypothesis tests for 7.2.5 and 7.2.9,
7.3.5, 7.3.7. 7.3.8, 7.4.2, 7.4.3, 7.4.7, 7.5.5a, 7.5.6, 7.5.7


Key 
Oct. 26 
9 
7.6.1, 7.6.8, #8: "What is the effect size in
7.6.8 (and 7.6.7)?", #9: "The C.I. found in 7.6.7 is
(0.0841,0.0979). What is causing the difference between the answers (and conclusion) in
7.6.7 and 7.6.8?", 7.7.2, 7.7.3, 7.7.8, 7.9.1 (BONUS), 7.10.4,
For the questions in the following file, perform the appropriate 9 (8) step hypothesis tests
Homework9.pdf Updated 11/1/12

Key 
Nov. 2 
10 
8.2.2, 8.2.4, 8.2.5, #9:
"In Excercise 8.2.5, construct a 99% confidence interval the wrong way, using the
independentsamples method. How does this interval differ from the one that you obtained in
8.2.5? (df using this method is 15.54)", 8.4.6, 9.1.1, 9.1.7, 9.2.4
(interpret the confidence interal), 9.2.9 (replace 'standard error of the mean' with w),
9.2.10 (replace 'standard error of the mean' with w), 9.2.11 (replace 'standard error of
the mean' with w 
Key 
Nov. 16 
11 
10.2.4 (Perform the hypothesis test. Be sure to state the null hypothesis
in symbols and words. You do not need to calculate the Pvalue),10.2.6 (same comments
as in 10.2.4), 10.2.7 (part a, same comments as in 10.2.4. Be sure to also do part b),
10.5.6, 10.6.1 (The required information from 10.2.10 is NOT in the back
of the book, you will have to calculate it), 10.7.2, 10.9.3,
#11: "Using the data in Excercise 10.9.3,
calculate the odds ratio
for the hip displasia for Golden Retrievers compared to Border Collies.",
11.2.2 (there is an error in the table, SD_{3} = 2.74, not 3.16),
11.2.5, 11.4.5 (parts b and c should be combined, include all the
steps (except for 1) for the hypothesis test), 11.4.7, 11.5.2 (you just
need to include one reason), 11.6.1a, 11.7.6 (dfw = 32, the rest of the df's = 1, parts b and
c require full hypothesis tests), #11: "a) Use the
information in Exercise 11.9.3 to calculate all of the comparisons for the Bonferroni method be sure to
calculate all of the appropriate confidence intervals and draw a line graph to dispaly the results. b)
Which diet or diets produces the highest concentration of selenium in the blood of the cattle? Please
explain your answer c) Repeat part a) for the Tukey method, d) Are the resulting CIs from the two methods
the same? If not, what are the differences?", 12.2.1, 12.2.2b (the sum of the product of the standardized
values is 1.743) 

Key 
Wednesday Dec. 5 
Extra Problems:
12.2.7, 12.2.9, 12.3.7 (Key), 12.5.3, 12.5.9, 12.6.1, 12.6.6 (Key), 13.2.1 (answer in the back of the book), 13.2.3, 13.2.5, 13.2.7, 13.2.8, 13.2.10 (answer in the back of the book), 13.2.12 (answer in the back of the book), 13.2.13, 13.2.15, 13.2.17, 13.2.19, 13.2.21. Note: for all of the questions, please describe a graphical procedure to help visualize the data and discuss how the data likely meet the necessary conditions for validity. If you want to preform the analysis of the data (which is on the missing problems), please let me know and I will post those keys also. (Key)