A research center survey of 2,335 adults found that 1,889 had bought something online. Of these online shoppers, 1,240

are weekly online shoppers.

a. Construct a 95% confidence interval estimate of the population proportion of adults who had bought something online.

.7931 .8249

(Round to four decimal places as needed.)

b. Construct a 95% confidence interval estimate of the population proportion of online shoppers who are weekly online shoppers.

enter your response here enter your response here

(Round to four decimal places as needed.)