Aresearcher wishes to estimate the percentage of adults who support abolishing the penny. What size sample should be obtained if he wishes the estimate to be within 3 percentage points with 95%...

Extracted text: Aresearcher wishes to estimate the percentage of adults who support abolishing the penny. What size sample should be obtained if he wishes the estimate to be within 3 percentage points with 95% confidence if (a) he uses a previous estimate of 22% (b) he does not use any prior estimates? (Round up to the nearest integer.) (a) n (b) n Round up to the nearest integer.)