LESSON 23

The data for Exercises 1 through 5 are in the data set named Lesson 23 Exercise File 1 on the Web at http://www.prenhall.com/greensalkind. The data are from the following research problem.

Mike, a developmental psychologist, wants to know if overall life stress increases or decreases as working women grow older. He obtains scores on the ILS (Index of Life Stress) from a group of 100 working women when they are 40 years of age. He is able to obtain a second ILS from 45 of these women at age 60 to assess whether they felt significantly more or less stress as they grew older. The ILS consists of two scores, interpersonal life stress and occupational life stress. The two scores combine to form an index of overall life stress. The SPSS data file contains 45 cases, one for each woman, and four variables, their interpersonal and occupational life stress at age 40 and their interpersonal and occupational life stress at age 60.

1. Compute scores to obtain a total Index of Life Stress (ILS) at age 40 and age 60.
2. Compute a paired-samples t test to determine if overall life stress increases or decreases with age.
3. Create a difference variable to show the changes in life stress from 40 years of age to 60 years of age for each woman, Create a histogram to show these changes graphically.
4. Mike decides that an overall ILS does not adequately reflect changes in women's life stress over time. He hypothesizes that occupational stress probably declines as women get older, while interpersonal life stress may increase or stay the same. Conduct paired-samples t tests to evaluate these hypotheses.
5. Write a Results section based on your analyses in Exercises I through 4. Be sure to include graphical and statistical descriptions in your results.

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Solution: The downloadable solution consists of 6 pages, 513 words and 1 charts.
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