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A sample of 65 information system managers had an average hourly income of $42.75 and a...

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Statistics

A sample of 65 information system managers had an average hourlyincome of $42.75 and a standard deviation of $7.50.

a. When the 95% confidence interval has to be developed for theaverage hourly income of all system managers, its margin of erroris

b. The 95% confidence interval for the average hourly income ofall information system managers is

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Solution Given that 4275s 750n 65Degrees of freedom df n 1 65    See Answer
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