Redo the one-way ANOVAs requested in Computer Exercise 2 of the previous chapter, selecting both Tukey and Bonferroni from the list of post hoc tests in each case. What is the problem with using HSD to make comparisons between groups in this exercise? Use the results for this exercise to compare the power of Tukey and Bonferroni for testing all possible pairs of means.
Data from computer exercise 2
Using college major as the independent variable, perform one-way ANOVAs to test for significant differences in both the math background quiz and the statistics quiz. Request descriptive statistics and a homogeneity of variance (HOV) test. Use the sample means to explain the results of each ANOVA. Do the standard deviations of the samples seem consistent with the results of the HOV test in each case?
