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-   -   How do you find standard deviation (https://www.askmehelpdesk.com/showthread.php?t=326421)

  • Mar 8, 2009, 10:03 AM
    shrimp
    How do you find standard deviation
    If I have the following information
    (A) 5%, 10%, 15%, 4% = 5+10+15+4 = 34%
    Sum 34%/4 Years = Average Return 8.5%

    How do I find the Variance,
    Standard deviation
    Coefficient variation
  • Mar 8, 2009, 01:14 PM
    Perito

    You have the sum and the average. Subtract the average from each of the values and square it. Add up the squared values and divide by "n-1", one less than the number of entries. In this case, 3. That is the standard variation.

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