0 In the data file Stress.dat, available on the Web site, are data on the stress level reported by cancer patients and their spouses at two different times—shortly after the diagnosis and 3 months...

0 In the data file Stress.dat, available on the Web site, are data on the stress level reported by cancer patients and their spouses at two different times—shortly after the diagnosis and 3 months later. The data are also distinguished by the gender of the respondent. As usual, a “.” indicates each missing data point. See description in Appendix: Computer Data Sets, p. 686.

a. Use any statistical package to run a repeated-measures analysis of variance with Gender and Role (patient versus spouse) as between-subject variables and Time as the repeated measure. (You may have to instruct the program on the symbol for missing data or else change that symbol in the data.)

b. Have the program print out cell means, and plot these means as an aid in interpretation.

c. There is a significant three-way interaction in this analysis. Interpret it along with the main effects.