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Math Help - Standard deviation

  1. #1
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    Standard 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
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  2. #2
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    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
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  3. #3
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    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 ) ?
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  4. #4
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    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
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  5. #5
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    Quote Originally Posted by Peikko View Post
    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 ) ?
    You have already been told by reputable members both here and at at least one other website that this cannot be done. Thread closed.
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