# How does your answer to part g relate to your answer to part b of Exercise

This exercise continues to examine the data in Exercise 13, but now from the perspective of confidence intervals. a. Form a 95% confidence interval for the mean difference between Groups 3 and 4, assuming homogeneity of variance. b. Form a 95% confidence interval for the mean difference between Groups 3 and 4, without assuming homogeneity of variance. c. How do your results in parts a and b compare to one another? Explain your answer. d. How does your answer to part c relate to your answer to part a of Exercise 13? e. Form a 95% confidence interval for the mean difference between Groups 1 and 2, assuming homogeneity of variance. f. Form a 95% confidence interval for the mean difference between Groups 1 and 2, without assuming homogeneity of variance. g. How do your results in parts e and f compare to one another? Explain your answer, h. How does your answer to part g relate to your answer to part b of Exercise 13? i. Form a 95% confidence interval for the mean difference between the average of Groups 1 and 2 as compared to the average of Groups 3 and 4, assuming homogeneity of variance. j. Form a 95% confidence interval for the mean difference between the average of Groups 1 and 2 as compared to the average of Groups 3 and 4, without assuming homogeneity of variance. k. How do your results in parts i and j compare to one another? Explain your answer.

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