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 95% 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 .03.The necessary sample size is at least _______.

A) 27
B) 188
C) 211
D) 897
E) 900