Question: a simple random sample of 285 part time workers finds that the average wage is $19.32 with a standard deviation of $2.61. The data follows

a simple random sample of 285 part time workers finds that the average wage is $19.32 with a standard deviation of $2.61. The data follows the normal curve.

As part of an effort to push for higher wages, suppose that labor unions want to know, with 99% confidence, the average wage of part time workers to within $0.25. Determine the appropriate sample size.

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