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- April 28th 2009, 07:38 AM #1

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## Help me please

Let x = age of employee . Assume x is normally distributed with a men of 38 and a standard of 9

what fraction of employees are under the age of 40

if one employee is picked at random, what is the probability that he will be under the age of 40.

If a simple random sample of 100 employee is picked, what is the probability that the sample mean will be less than 40

- April 28th 2009, 08:18 PM #2

- April 28th 2009, 09:05 PM #3

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- April 28th 2009, 09:24 PM #4