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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 25%? (b) he does not use any prior estimates? (a)n-(Round up to the nearest integer.)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 95% confidence if (a) he uses a previous estimate of 38%? (b) he does not use any prior estimates? (a) n- 363 (Round up to the nearest integer.) (b)n-385 (Round up to the nearest integer.)

Hi! the second example shows the entire qestion to the first problem, please answer the first question with those steps. :-)

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