2. A researcher surveyed 12 men whose parents got divorced. His survey included the age of the subjects when their parents got divorced and their confidence that they would some day be happily married themselves (100 point scale- higher score more confidence). It was predicted that there would be a significant negative relationship. The results are shown below. Use alpha = .01 Age %3D Confidence Rating 12 34 30 11 89 21 69 15 55 38 18 78 23 66 89 22 19 79 35 9. 15 58 X-15 SS. = 348 SS,= 5198 Sx=5.62 SPay = 933 Y= 60 Sy= 21.74 A. Plot these data on the graph. B. State the null and alternative hypotheses in regards to the correlation coefficient. C. Make a decision about the null. a. Calculate Pearson's r and make a decision. b. Calculate the effect size. i. Was the effect small, medium, or large? D. State your conclusion. E. Relate your conclusion to the research. F. Calculate the regression equation. G. What is one's predicted confidence rating if their parents got divorced at age 15?
2. A researcher surveyed 12 men whose parents got divorced. His survey included the age of the subjects when their parents got divorced and their confidence that they would some day be happily married themselves (100 point scale- higher score more confidence). It was predicted that there would be a significant negative relationship. The results are shown below. Use alpha = .01 Age %3D Confidence Rating 12 34 30 11 89 21 69 15 55 38 18 78 23 66 89 22 19 79 35 9. 15 58 X-15 SS. = 348 SS,= 5198 Sx=5.62 SPay = 933 Y= 60 Sy= 21.74 A. Plot these data on the graph. B. State the null and alternative hypotheses in regards to the correlation coefficient. C. Make a decision about the null. a. Calculate Pearson's r and make a decision. b. Calculate the effect size. i. Was the effect small, medium, or large? D. State your conclusion. E. Relate your conclusion to the research. F. Calculate the regression equation. G. What is one's predicted confidence rating if their parents got divorced at age 15?
MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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2) Parts
A
B
C
D
Transcribed Image Text:2. A researcher surveyed 12 men whose parents got divorced. His survey included the age of the subjects when their
parents got divorced and their confidence that they would some day be happily married themselves (100 point scale-
higher score more confidence). It was predicted that there would be a significant negative relationship. The results are
shown below. Use alpha = .01
Age
%3D
Confidence Rating
12
34
30
11
89
21
69
15
55
7
38
18
78
23
66
22
89
19
79
9.
35
15
58
X-15
SS, = 348 Ss, = 5198
Y= 60
%3D
%3D
Sx = 5.62
SPay= 933
Sy= 21.74
%3D
A. Plot these data on the graph.
B. State the null and altenative hypotheses in regards to the correlation coefficient.
C. Make a decision about the null.
a. Calculate Pearson's r and make a decision.
b. Calculate the effect size.
i. Was the effect small, medium, or large?
D. State your conclusion.
E. Relate your conclusion to the research.
F. Calculate the regression equation.
G. What is one's predicted confidence rating if their parents got divorced at age 15?
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