PSY-380 Introduction to Probability and Statistics
Project 3
Answer each question completely. Copy and Paste the SPSS output into the word document for the calculations portion of the problems, highlighting co
ect answers. (Please remember to answer the questions you must interpret the SPSS output).
1. A researcher is interested to learn if there is a linear relationship between the hours in a week spent exercising and a person’s life satisfaction. The researchers collected the following data from a random sample, which included the number of hours spent exercising in a week and a ranking of life satisfaction from 1 to XXXXXXXXXXbeing the lowest and 10 the highest).
Participant
Hours of Exercise
Life Satisfaction
1
3
1
2
14
2
3
14
4
4
14
4
5
3
10
6
5
5
7
10
3
8
11
4
9
8
8
10
7
4
11
6
9
12
11
5
13
6
4
14
11
10
15
8
4
16
15
7
17
8
4
18
8
5
19
10
4
20
5
4
a. Find the mean hours of exercise per week by the participants.
. Find the variance and standard deviation of the hours of exercise per week by the participants.
c. Run a bivariate co
elation to determine if there is a linear relationship between the hours of exercise per week and the life satisfaction. Report the results of the test statistic using co
ect APA formatting.
d. Run a linear regression on the data. Report the results, using co
ect APA formatting. Identify the amount of variation in the life satisfaction ranking that is due to the relationship between the hours of exercise per week and the life satisfaction (Hint: the R2 value)
e. Report a model of the linear relationship between the two variables using the regression line formula.
2. Insomnia has become an epidemic in the United States. Much research has been done in the development of new pharmaceuticals to aide those who suffer from insomnia. Alternatives to the pharmaceuticals are being sought by sufferers. A new relaxation technique has been tested to see if it is effective in treating the disorder. Sixty insomnia sufferers between the ages of 18 to 40 with no underlying health conditions volunteered to participate in a clinical trial. They were randomly assigned to either receive the relaxation treatment or a proven pharmaceutical treatment. Thirty were assigned to each group. The amount of time it took each of them to fall asleep was measured and recorded. The data is shown below. Run an independent samples t-test to determine if the relaxation treatment is more effective than the pharmaceutical treatment at a level of significance of 0.05. Report the test statistic using co
ect APA formatting and interpret the results.
Relaxation
Pharmaceutical
98
20
117
35
51
130
28
83
65
157
107
138
88
49
90
142
105
157
73
39
44
46
53
194
20
94
50
95
92
161
112
154
71
75
96
57
86
34
92
118
75
41
41
145
102
148
24
117
96
177
108
119
102
186
35
22
46
61
74
75
3. A researcher is interested to learn if the level of interaction a women in her 20s has with her mother influences her life satisfaction ratings. Below is a list of women who fit into each of four levels of interaction. Conduct a One-way ANOVA on the data to determine if there are differences between groups; does the level of interaction influence women’s ratings of life satisfaction? Report the results of the One-way ANOVA. If significance is found, run the appropriate post-hoc test and report between what levels the significant differences were found. Report the test statistic using co
ect APA formatting and interpret the results.
No Interaction
Low Interaction
Moderate Interaction
High Interaction
2
3
3
9
4
3
10
10
4
5
2
8
4
1
1
5
7
2
2
8
8
2
3
4
1
7
10
9
1
8
8
4
8
6
4
1
4
5
3
8
4. Are handedness and gender related? A researcher collected the following data in hopes of discovering if handedness and gender are independent (Ambidextrous individuals were excluded from the study). Use the Chi-Square test for independence to explore this at a level of significance of 0.05. Report the test statistic using co
ect APA formatting and interpret the results.
Left-Handed
Right-Handed
Men
13
22
Women
27
18
5. A researcher is interested in studying the effect that the amount of fat in the diet and amount of exercise has on the mental acuity of middle-aged women. The researcher used three different treatment levels for the diet and two levels for the exercise. The results of the acuity test for the subjects in the different treatment levels are shown below.
Diet
Exercise
<30% fat
30% - 60% fat
>60% fat
<60 minutes
4
3
2
4
1
2
2
2
2
4
2
2
3
3
1
60 minutes
6
8
5
or more
5
8
7
4
7
5
4
8
5
5
6
6
a. Perform a Two-way analysis of variance (ANOVA) and report the results using co
ect APA style; report whether significance was found for Factor A, Factor B, and/or an interaction between Factors A and B was found.
. If the test statistic is significant, run a post hoc test to determine between what groups significance was found.
c. Report an effect size for all significant results.
© Grand Canyon University 2015 5