What is the likelihood that the sample mean

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PROBLEM 1

A laptop manufacturer finds that the average time it takes an employee to load a laptop with software is 35 minutes with a standard deviation 15 minutes. Suppose you take a random sample of 121 employees. The standard deviation of the sample mean is:

PROBLEM 2

A company that manufactures bookcases finds that the average time it takes an employee to build a bookcase is 10 hours with a standard deviation of 2 hours. A random sample of 64 employees is taken. What is the likelihood that the sample mean will be 9 hours or more?

Reference no: EM132384299

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