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Variance and Standard Deviation

  1. #1
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    09-13-2007
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    Variance and Standard Deviation

    I'm trying to calculate the var and stdev of the last 3 weeks of a set of data. I've attached the data.

    any help would be appreciated
    Attached Files Attached Files

  2. #2
    Valued Forum Contributor mdbct's Avatar
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    11-11-2005
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    Re: Variance and Standard Deviation

    Both of the following formulas are array formulas. They need to be confirmed using Ctrl+Shift+Enter:

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    I noticed your formula in H3 does not include today or the date 21 days ago. The formulas I provided include those two days

  3. #3
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    Re: Variance and Standard Deviation

    Thanks...Works perfectly. Now I have to figure out if there is any variance in the number of behaviors that occur. Any Stats whizzes out there?

  4. #4
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    Re: Variance and Standard Deviation

    variance is the standard deviation squared

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