I Homework: Ch9 HW One Sample Confidence Intervals QueStion 8' 9'1'39 Part 3 of 3 Atelevision 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 2 percentage points with 95% condence if he uses an estimate of 52% obtained from a poll? The sample size is 2393 . (Round up to the nearest integer.) (b) What sample size should be obtained if he wants to be within 2 percentage points with 95% condence 'rr he does not use any prior estimates? The sample size is 2401 . (Round up to the nearest integer.) (c) Why are the results from parts (a) and (b) so close? 0 A. The results are close because the condence 95% is close to 100%. O B. The results are close because the margin of error 2% is less than 5%. O C. The results are close because 0.52(1 0.52): 0.2496 is very close to 0.25