A Researcher Wants to Estimate the Proportion of Millennials Who

Multiple Choice

A researcher wants to estimate the proportion of Millennials who regularly listen to podcasts (defined as at least two entire podcasts per week) .Previous studies indicate that only 18% of Millennials listen regularly to podcasts,and this researcher wants to estimate if that figure has increased.For this purpose,the researcher will use a 98% confidence level and wants to estimate the population proportion within 0.01 (i.e.,1 percentage point) of the actual value.The required sample size is at least ______.

A) 47
B) 48
C) 320
D) 321
E) 331