Exercise 4.38 on page 235 describes a possible study to see if there is evidence that a recorded phone call is more effective than a mailed flyer in getting voters to support a certain candidate. The study assumes a significance level of α = 0.05.
(a) What is the conclusion in the context of this study if the p-value for the test is 0.027?
(b) In the conclusion in part (a), which type of error are we possibly making: Type I or Type II? Describe what that type of error means in this situation.
(c) What is the conclusion if the p-value for the test is 0.18?
(d) In the conclusion in part (c), which type of error are we possibly making: Type I or Type II? Describe what that type of error means in this situation.