A researcher 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 4
percentage points with 95% confidence if
(a) he uses a previous estimate of 38%?
(b) he does not use any prior estimates?
Click here to view the standard normal distribution table (page 1).
Click here to view the standard normal distribution table (page 2).
(a) n =
(b) n=
(Round up to the nearest integer.)
(Round up to the nearest integer.)
