8.47 Are the customers dissatisfied?

Refer to Exercise 8.44, where you computed the sample size based on the width of a confidence interval. Now we will use the same setting to determine the sample size based on a significance test. You want to test the null hypothesis that the population proportion is 0.09 using a two-sided test with and 80% power. Use 0.19 as the proportion for the alternative. What sample size would you recommend? Note that you need to specify an alternative hypothesis to answer this question.