A researcher wishes to estimate the proportion if adults who have high-speed internet access. What size sample should be obtained if she wishes the estimate to be 0.04 with 95% confidence if

A) she uses a pervious estimate of 0.46?

B) she does not use any prior estimates?

Level of Confidence Area in Each Tail a over 2 Critical Value, z a over 2

(1-a)*100%

90% 0.05 1.645

95% 0.025 1.96

99% 0.005 2.575