1. An aerobics teacher believed that physical conditioning is an important factor in the ability to perform skills, even if the skill does not require strength or endurance. To test this hypothesis, she selected 10 high BMI (body mass index) women enrolled in her aerobics course. Before the first class, she tested them on a button-sorting task. After a full semester of regular exercise, she tested the women on the same button-sorting task. Scores represent the number of seconds required to sort the buttons.

a. Analyze the data with a nonparametric test and comment on the aerobics teacher's hypothesis.

Subject Pretest Score Posttest Score

1 29 31

2 33 28

3 36 39

4 37 37

5 40 44

6 42 41

7 45 51

8 47 50

9 50 56

10 56 49

b. What is the correlation between the pretest and posttest rankings of the women on the button sorting test? Find the correlation and explain what it means.

2. Find the correlation (rs) for the data below and write a conclusion.

Rank in Weight Rank in Dominance Hierarchy

1 3

2 4

3 1

4 8

5 7

6 2

7 5

8 6

9 9

3. Students in a 1 P.M. laboratory section in general psychology observed eight people they did not know and made a judgment about their IQ. Half the eight wore glasses; half did not. The 3 P.M. laboratory section judged the same eight persons, but those who wore glasses at 1 P.M. did not wear them at 3 P.M. and vice versa. The result was that each of the eight was given an estimated IQ both with and without glasses. What is the question this experiment is designed to answer? What is the answer to the question?

Without Glasses With Glasses

121 127

97 104

114 110

131 139

118 120

91 86

127 140

114 125

4. An I/O (industrial/organizational) psychologist tested consumer reaction to two methods of unit pricing of canned fruit juice. One method provided price per ounce and the other gave price per pound. The consumers filled out a questionnaire in which higher scores represent a more favorable reaction. A different sample of consumers was used for each method. Set = .05, run a two-tailed test and determine if the two methods result in different consumer reactions.

Price per Ounce Price per Pound

43 46

70 72

25 38

36 84

34 69

55 73

51 65

80 79

76 47

55 26

40 57

20 61

Please explain detailed answers with Answer 1a. 1b, 2, 3, and 4.

Thank you!