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 α = .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
9.17 Consider dot plots 1 and 2 shown below. Assume that the two samples represent independent, random samples corresponding to two treatments in a completely randomized design.
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Statistics for Business and Economics (13th Edition)
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