Use the data from Mireault (1990) in the file named Mireault.dat referred to in Exercise 7.6 to run a two-way analysis of variance on the Global Symptom Index T score (GSIT) using Gender and Group as...

Use the data from Mireault (1990) in the file named Mireault.dat referred to in Exercise 7.6 to run a two-way analysis of variance on the Global Symptom Index T score (GSIT) using Gender and Group as independent variables. Plot out the cell means and interpret the results.

Using the same data as in Exercise 16.21, run an analysis of covariance instead, using year in college (YearColl) as the covariate. a. Why would we want to consider YearColl as a covariate? b. How would you interpret the results?