A television sports commentator wants to estimate the proportion of Americans who follow professional football. What sample
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A television sports commentator wants to estimate the proportion of Americans who follow professional football. What sample size should be obtained if he wants to be within 3 percentage points with 95% confidence if
(a) he uses an estimate of 52% obtained from a poll?
(b) he does not use any prior estimates?
(c) Why are the results from parts (a) and (b) so close?
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Related Book For 
Statistics Informed Decisions Using Data
ISBN: 9781292157115
5th Global Edition
Authors: Michael Sullivan
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