Refer to Exercise 9.17. Conduct a two-sample t-test (Section 8.2) of the null hypothesis that the two treatment means are equal for each dot plot. Use a = .05 and two tailed tests. In the course of the test, compare each of the following with the F-tests in Exercise 9.17:
a. The pooled variances and the MSEs
b. The t- and F-test statistics
c. The tabled values of t and F that determine the rejection regions
d. The conclusions of the t- and F-tests
e. The assumptions that must be made to ensure the validity of the t- and F-tests