Posted by **Laynette** on Friday, September 2, 2011 at 9:47pm.

A sample of 106 golfers showed that their average score on a particular golf course was 87.98 with a standard deviation of 5.39.

Answer each of the following (show all work and state the final answer to at least two decimal places.):

(A) Find the 90% confidence interval of the mean score for all 106 golfers.

(B) Find the 90% confidence interval of the mean score for all golfers if this is a sample of 130 golfers instead of a sample of 106.

(C) Which confidence interval is larger and why?

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