Refer to Exercise 10.23. Conduct a two-sample t-test

(Section 9.2) of the null hypothesis that the two treatment means are equal for each dot plot. Use a = .05 and twotailed tests. In the course of the test, compare each of the following with the F-tests in Exercise 10.23:

a. The pooled variances and the MSEs

b. The t- and the 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 in order to ensure the validity of the t- and F-tests