Projects



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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 n1 = 50 and n2 = 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 independent-samples 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 ), #10: "In Exercise 9.2.4, determine the 95% upper bound for the population proportion of this trait.", #11: "In Excercise 9.2.4, what is the 99% confidence interval for the population proportion of this trait?", 9.4.5 (Remember to perform the complete hypothesis test), 9.4.11 (Remember to perform the complete hypothesis test) | 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 P-value),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, SD3 = 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)


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