Question

The American Heart Association is about to conduct an anti-smoking campaign and wants to know the fraction of Americans over 22 who smoke. In an earlier study, the population proportion was estimated to be 0.3. How large a sample would be required in order to estimate the fraction of Americans over 22 who smoke at the 98% confidence level with an error of at most 0.03? Round your answer up to the next integer.

Answer 1

Sample size ( n ) = 1263