SPSS ASSIGNMENT # 6

The t Test for Independent Samples

SPSS instructions t o run t he t Test for Independent Samples: (For more details, check the links provided under "Course Materials" in the Course Overview Folder (under Lessons).

Once you have entered the data, click on Analyze , then on Compare Means , and then click on Independent-Samples T Test …

A dialog box will appear, with your variables (student, condition, score) on the left. Your options are (a) move one or more variables into the "Test Variable(s)" box to select your dependent variables(s) and (b) move one of your variables into the "Grouping Variable" box to select the independent variables (or identify the groups to be compared).

Make "?" the dependent variable by moving it to the "Test Variable(s)" box. Then make "?" your independent variable by moving it to the "Grouping Variable" box. Now, the "Define Groups" button is functioning, click on Define Groups and another dialog box appears. Here you must specify the two values of the condition variable that represent the two groups you are comparing. Click in the box next to Group 1 and type the number 1, then click in the box next to Group 2 and type the number 2. Now you can click Continue to return to the "Independent-Samples T Test" dialog box, and click on OK to run the analysis.

1. Six months after an industrial accident, a researcher has been asked to compare the job satisfaction of employees who participated in counseling sessions with the satisfaction of employees who chose not to participate.
   The scores on a job satisfaction inventory for both groups are listed in the table below.
   Use the five steps of hypothesis testing to determine whether the job satisfaction scores of the group that participated in counseling are statistically higher than the scores of employees who did not participate in counseling at the .01 level of significance.
   In Step 2, show all calculations.
   As part of Step 5, indicate whether the researcher should recommend counseling as a method to improve job satisfaction following industrial accidents based on evaluation of the null hypothesis and calculate the effect size.

   PARTICIPATED IN COUNSELING	DID NOT PARTICIPATE IN COUNSELING
   36	37
   39	35
   40	36
   36	33
   38	30
   35	38
   37	39
   39	35
   42	32

2. A researcher is interest in the effect of exercise on the perceptions of well-being among older. The researcher identified 30 residents of a retirement community and divided them into groups of 15 residents. Both groups were encouraged to walk at least 20 minutes per day. One group, however, also participated in a structured exercise program that emphasized flexibility. After 6 weeks, the behavioral scientist mailed questionnaires to the 30 residents. Responses to an item asking residents to rate their perceptions of their health on a 10-point scale on which 1 indicated "very unhealthy" and 10 indicated "very healthy" are presented in the table that follows.

Use the five steps of hypothesis testing to determine whether the observed differences in health ratings of the two groups are statistically significant at the .05 level of significance.

In Step 2, show all calculations.

As part of Step 5, indicate whether the researcher should recommend exercise as a method to improve perceptions of health among older adults based on evaluation of the null hypothesis and calculate the effect size.

Price: $14.73

Solution: The downloadable solution consists of 6 pages, 873 words and 2 charts.
Deliverable: Word Document