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  • Card 7 / 7:
    Variance

    Mean of the squared deviations from the mean. Square of the standard deviation. For a set of data, a deviation can be represented as x - x where x is a value of the data and x is the sample mean. The sample variance is equal to the sum of the squares of the deviations divided by the difference of the sample size and 1.

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Source:  OpenStax, Collaborative statistics for mt230. OpenStax CNX. Aug 18, 2011 Download for free at http://legacy.cnx.org/content/col11345/1.2
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