In response to the question "How do you judge a company?" 84% said the most important way was how a company responded to a crisis. (Data extracted from "How Do You Judge a Company?" USA Today, December 22, 2008, p. 1B.)
a. If you conduct a follow-up study to estimate the population proportion of individuals who said that the most important way to judge a company was how the company responded to a crisis, would you use a π of 0.84 or 0.50 in the sample size formula? Discuss.
b. Using your answer to (a), find the sample size necessary to estimate, with 95% certainty, the population proportion to within ± 0.03.