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Confidence interval for the mean

A lawyer researched the average number of years served by 45 different justices on the Supreme Court. The average number of years served was 13.8 years with a standard deviation of 7.3 years. What is the 95% confidence interval estimate for the average number of years served by all Supreme Court justices? Rround to 1 decimal place in the blanks.

Lower limit (first blank) = __________
Upper limit (second blank) = ___________

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Lower limit (first blank) = ____11.7_____
Upper limit (second blank) = ___15.9___

This solution shows how to ...

Solution Summary

This solution shows details of how to calculate a large sample (n > 30) confidence interval for a popuation mean.

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