What is the minimum sample size required

Reference no: EM131096019

4.17 A researcher wishes to estimate the mean weekly wage of the several thousands of workers employed in a plant within plus or minus $20 and with a 99% degree of con?dence. From past experience, the researcher knows that the weekly wages of these workers are normally distributed with a standard deviation of $40. What is the minimum sample size required?

Reference no: EM131096019

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