Chapter 10.2, Problem 33E

a.

To determine

Check whether there is evidence that overall distance is approximately normally distributed or not.

Check whether the assumption of equal variances justified or not.

b.

To determine

Test the hypothesis that the both brands of ball have equal mean overall distance.

Find the P-value.

c.

To determine

Obtain a 95% two-sided confidence interval on the mean difference in overall distance for the two brands of golf balls.

d.

To determine

Find the power of the statistical test in part (b) to detect a true difference in mean overall distance of 5 yards.

e.

To determine

Find the sample size that is required to detect a true difference in mean overall distance of 3 yards with power of approximately 0.75.