Average score on a particular golf course


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?

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Basic Statistics: Average score on a particular golf course
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