Football Fans A television sports commentator wants to estimate the proportion of
Chapter 9, Problem 37(choose chapter or problem)
Football Fans 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 a 2010 estimate of 53% obtained from a Harris 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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