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The mean wage per hour for all 4000 employees who work at large company is RM30.00, and the variance is 16. Let be the mean

The mean wage per hour for all 4000 employees who work at large company is RM30.00, and the variance is 16. Let be the mean wage per hour for a random sample of certain employees selected from this company.

Find the mean and standard deviation of for a sample size of 100?

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