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# Solve: Confidence Interval for the mean

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Scenario: A study of 35 golfers showed that their average score on a particular course was 92. The standard deviation of the sample is 5.

Solve the following questions:
Find the best point estimate of the mean.
Find the 95% confidence interval of the mean score for all golfers.
Find the 95% confidence interval of the mean score if a sample of 60 golfers is used instead of a sample of 35.

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#### Solution Summary

This solution provides a step-by-step methodology for the calculation of the confidence interval for the mean. Formulas for the calculations and interpretations of the results are included. An Excel sheet is attached, which shows all of the functions required for computing the intermediate calculations and confidence intervals. A Word document is also attached and it contains the written out solution including charts and the equations used.

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