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 X 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
