Question

A survey of 1,060 tablet owners was conducted. In response to a survey question about​ shopping, 26% of tablet owners said they use mobile devices for​ payment, 19​% said they use such devices to make social media comments about their​ purchases, and 11% said they use such devices to retrieve mobile coupons. Complete parts​ (a) through​ (d) below.

a. Construct a 90% confidence interval estimate of the population proportion of tablet owners who said they use mobile devices for payment.

b. Construct a 90​% confidence interval estimate of the population proportion of tablet owners who said they use mobile devices to make social media comments about their purchases.

c. Construct a 90​% confidence interval estimate of the population proportion of tablet owners who said they use mobile devices to retrieve mobile coupons.

d. You have been asked to update the results of this study. Determine the sample size necessary to​ estimate, with 90​% ​confidence, the population proportions in​ (a) through​ (c) to within ± 0.04.

For part a, the sample size is ___

For part b, the sample size is ___

For part c, the sample size is ___

Answer 1