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A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size...

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

55

percentage points with

9595​%

confidence if

​(a) he uses a previous estimate of

2424​%?

​(b) he does not use any prior​ estimates?

Math   Statistics-And-Probability   
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