A Researcher Wants to Estimate the Percent of the Population

Multiple Choice

A researcher wants to estimate the percent of the population that uses the radio to stay informed on local news issues.The researcher wants to estimate the population proportion with a 90% level of confidence. He estimates from previous studies that no more than 30% of the population stay informed on local issues through the radio.The researcher wants the estimate to have an error of no more than .02. The necessary sample size is at least _______.

A) 29
B) 47
C) 298
D) 1421
E) 1500