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A clinical psychologist is interested in the relationship between testosterone level in married males and the quality of their marital relationship A study is conducted in which the testosterone

A clinical psychologist is interested in the relationship between testosterone level in married males and the quality of their marital relationship A study is conducted in which the testosterone

A clinical psychologist is interested in the relationship between testosterone level in married males and the quality of their marital relationship. A study is conducted in which the testosterone levels of eight married men are measured. The eight men also fill out a standardized questionnaire assessing quality of marital relationship. The questionnaire scale is 0 – 25, with higher numbers indicating better relationships. Testosterone scores are in Nano moles/liter of serum. The data are shown below.

Subject Number

1

2

3

4

5

6

7

8

Relationship

24

15

15

10

19

11

20

19

Score

 

 

 

 

 

 

 

 

Testosterone

12

13

19

25

9

16

15

21

Level

 

 

 

 

 

 

 

 

a. On a piece of graph paper, construct a scatter plot of the data. Use testosterone level as the variable.

b. Describe the relationship shown on the graph.

c. Compute the value of Pearson r.

d. Determine the least-squares regression line for predicting relationship score from testosterone level. Should bY be positive or negative? Why?

e. Draw the least-squares regression line of part d on the scatter plot of part a.

f. Based on the data of the eight men, what relationship score would you predict for a male who has a testosterone level of 23 Nano moles/liter of serum?

mahesh 24-Aug-2020

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