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2.8 Measuring the spread of the data (modified r. bloom)

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    Standard Deviation

    A number that is equal to the square root of the variance and measures how far data values are from their mean. Notations: s for sample standard deviation and σ for population standard deviation.

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Source:  OpenStax, Collaborative statistics: custom version modified by r. bloom. OpenStax CNX. Nov 15, 2010 Download for free at http://legacy.cnx.org/content/col10617/1.4
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