Consider the following data from a two-factor experiment:

a. Determine if there is interaction between factor A and factor B. Use the p -value approach and a significance level of 0.05.
b. Does the average response vary among the levels of factor A? Use the test-statistic approach and a significance level of 0.05.
c. Determine if there are differences in the average response between the levels of factor B. Use the p -value approach and a significance level of 0.05.