# Confidence interval

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The union for a particular industry has determined that the standard deviation of the daily wages of its workers is $22. A random sample of 100 workers in this industry has a mean daily wage of $117. Find a 95% confidence interval for the true mean daily wage of all union workers in the industry. Then complete the table below.

Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place.

What is the lower limit of the 95% confidence interval?

What is the upper limit of the 95% confidence interval?

Could you please enclosed spreadsheet for future problems?

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#### Solution Summary

This solution gives the step by step method for computing confidence interval for estimating population mean

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