A sample of 140 golfers showed that their average score on a particular golf course was 93.38 with a standard deviation of 4.36. Answer each of the following.
(A) Find the 90% confidence interval of the mean score for all 140 golfers.
(B) Find the 90% confidence interval of the mean score for all golfers if this is a sample of 95 golfers instead of a sample of 140.
(C) Which confidence interval is smaller and why?