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 5 percentage points with 90% condence 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 (Egg) Click here to View the standard normal distribution table (pg) E) (a) n = [:1 (Round up to the nearest integer.)