c. Locate the 90% confidence interval for s on the printout. d. Use...

c. Locate the 90% confidence interval for s on the printout.

d. Use the result, part a, to calculate the 90% confidence interval for s. Does your result agree with the interval shown on the printout?

e. Give a practical interpretation of the 90% confidence interval for s.

f. What assumption about the distribution of level of support is required for the inference, part e, to be valid? Is this assumption reasonably satisfied?

Reference: Exercise 5.18