I was wondering if there is anyway to calculate standard deviation when you have the Mean and the N values.

For example:

Mean = 7.01

n = 91

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- May 28th 2009, 06:10 AMPeikkoStandard deviation
I was wondering if there is anyway to calculate standard deviation when you have the Mean and the N values.

For example:

Mean = 7.01

n = 91 - May 28th 2009, 06:43 AMartvandalay11
if you are just told that you have a distribution with mean=m and it is of size n, you cannot figure out the standard deviation

- May 28th 2009, 08:35 AMPeikko
Thanx for the reply. Is there any other way to get around it as I need to get SD from data that shows people in trial (91 ) and their % blood levels ( 7.01 ) ?

- May 28th 2009, 09:58 AMartvandalay11
Well if you actually have the data you can compute it with the formula for standard deviation... but if you just have two numbers written down of n=91 and mean=7.01 I don't think there is any way for you to get the standard deviation

- May 30th 2009, 05:40 AMmr fantastic