A Penny for Your Thoughts A researcher for the U.S. Department of the Treasury wishes to
Chapter 9, Problem 35(choose chapter or problem)
A Penny for Your Thoughts A researcher for the U.S. Department of the Treasury wishes to estimate the percentage of Americans who support abolishing the penny. What size sample should be obtained if he wishes the estimate to be within 2 percentage points with 98% confidence if (a) he uses a 2006 estimate of 15% obtained from a Coinstar National Currency Poll? (b) he does not use any prior estimate?
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