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PSY-380 Introduction to Probability and Statistics

Project 3 – SPSS or Excel Analyses

In SPSS or Excel, run the correct statistical test for each study.

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 10 (1 being 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. Run descriptive statistics on the data. Report the mean, variance and standard deviation for the data of hours of exercise per week by the participants. Copy and paste the SPSS or Excel output into the word document.

b. Run a bivariate correlation to determine if there is a linear relationship between the hours of exercise per week and life satisfaction. In 3-4 sentences interpret the results in words, then write the statistical results in APA style. Report the Pearson's Correlation and probability statistic.

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 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 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.

a. Run a two-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. Copy and paste the SPSS or Excel output into the word document.

b. In 3-4 sentences interpret the results in words, then write the statistical results in APA style. Report the t statistic and probability statistic.

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 woman 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 Between Subjects ANOVA on the data to determine if there are differences between groups; does the level of interaction influence women’s ratings of life satisfaction?

a. Report the results of the One-way Between Subjects ANOVA. If significance is found, run the appropriate post-hoc test and report between what levels the significant differences were found. Copy and paste the SPSS or Excel output into the word document.

b. In 3-4 sentences interpret the results in words, then write the statistical results in APA style. Report the F statistic and probability statistic.

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

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