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- September 18th 2008, 08:54 AM #1

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- September 18th 2008, 01:18 PM #2

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- September 18th 2008, 07:43 PM #3

- September 18th 2008, 08:54 PM #4

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If you have calculated the mean and standard deviation from a sample then you need to calculate the 1-st quartile from the sample, you can't get it from the maen and standard deviation.

If the mean and standard deviation are from a theoretical distribution you need to know what that distribution is to calculate the 1-st quartile.

In other words post the entire question.

RonL

- September 19th 2008, 08:24 AM #5

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- September 19th 2008, 09:15 AM #6

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- September 19th 2008, 01:45 PM #7