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Confidence interval for the population mean: Use of the standard normal

The union for a particular industry has determined that the standard deviation of the daily wages of its workers is $. A random sample of workers in this industry has a mean daily wage of $. Find a confidence interval for the true mean daily wage of all union workers in the industry.

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

What is the lower and upper limit of the 90% CI?

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Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M9418962

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