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Finding the Confidence Interval at 95% Confidence

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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?

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The solution gives detailed steps on finding the confidence interval at 95% confidence.

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Solution:
Margin of error = critical value*standard deviation/sqrt(sample size).

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