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Skewness

Skewness indicates the symmetry of the distribution about the mean. A value of zero indicates it is symmetrical, a positive value indicates the distribution has a right tail skew (more observations in the left-tail) that may be corrected with a log transform, and a negative value indicates the distribution has a left tail skew (more observations in the right-tail) that may be corrected with an inverse log transform.

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Part of the Analyse-it for Microsoft Excel user guide. For more information about Analyse-it, the statistics add-in for Microsoft Excel, or to download a free 30-day trial please visit http://www.analyse-it.com/. © Analyse-it Software, Ltd. Analyse-it® is a registered trademark. Microsoft® Excel® is a registered trademark of Microsoft.