Refer to Exercise 33, and consider a confidence interval associated with the sign test, the sign interval. The relevant hypotheses are now H0:

~

~0 versus Ha:

~

~0. Let’s use the following rejection region: either Y  15 or Y  5.

a. What is the significance level for this test?

b. The confidence interval will consist of all values

~0 for which H0 is not rejected. Determine the CI for the given data, and state the confidence level.