Question Help A television sports commentator wants to estimate the proportion of citizens who "follow professional football." Complete parts (a) through (c). Click here to view the standard normal distribution table (page 1) Click here to view the standard normal distribution table (page 2). (a) What sample size should be obtained if he wants to be within 4 percentage points with 96% confidence if he uses an estimate of 48% obtained from a poll? The sample size is (Round up to the nearest integer.) (b) What sample size should be obtained if he wants to be within 4 percentage points with 96% confidence if he does not use any prior estimates? The sample size is (Round up to the nearest integer.) (c) Why are the results from parts (a) and (b) so close? Click to select your answer(s).