Originally Posted by

**Cadag** I'm a little confused by this problem which seems simple, but I'm not really sure how to solve it.

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It says: The number of hamburgers ordered in a day is normally distributed with a Mean of 45 and Standard Deviation of 8.4, Then asks:

What is the probability Distribution (type of distribution, mean and Standard Deviation) of the average hamburgers ordered for 50, 100, 1000 Customers?

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Would the type of distribution just be normal for all 3 sizes, or is there a way to calculate the type distribution?

I'm not sure how to calculate the mean and SD for a already given mean and SD, when you are just given what I guess is the sample size. I have a formula to calculate the Standard deviation of the Sample Mean which is:

Standard Deviation / Square root of the sample size

But I'm not sure if these numbers, 50, 100, 1000 are sample mean sizes.

Thanks for any help.