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July 2nd, 2016, 03:30 AM   #1
Joined: Jul 2016
From: maryland

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Confidence interval word problem help

Confidece interval question
I have 2 statistics questions that I do not understand fully, can anyone solve these and explain the process for retrieving the answer?

A Survey Of 47 mernbers Of a health club reported that prefer walking Or running On a treadmill to any other type of aerobic excrcise. Construct and interprct a 99% confidence interval for the percentage
of health club who prefer walking/running on a treadmill.
99% - CI

Suppose we want to estimate to within $1000 the mean salary of all college graduates who were business
majors. How many business majors would we sample to estimate the mean salary to within $1000 with
95% confidence, if the standard deviation= 15, 000?
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