A researcher wishes to estimate the percentage of adults

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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 3 percentage points with 95% confidence if

a) he uses a previous estimate of 36%? (round up to nearest integer)

n = ?

b) ge does not use any prior estimates? (round up to nearest integer)

n = ?

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