A sample of 75 information system managers had an average hourly income of $40.75 with a standard deviation of $7.00. What is the 95% confidence interval for the average hourly wage of all information system managers?© BrainMass Inc. brainmass.com October 10, 2019, 7:04 am ad1c9bdddf
Margin of error = critical value*standard deviation/sqrt(sample size).
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The solution gives detailed steps on finding the confidence interval at 95% confidence.