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    shrimp's Avatar
    shrimp Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Mar 8, 2009, 10:03 AM
    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
    Perito's Avatar
    Perito Posts: 3,139, Reputation: 150
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    #2

    Mar 8, 2009, 01:14 PM

    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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