Skewness

Calculates how symmetrical the dataset is.

Interpretation

>0 the higher the Skewness value is the more skewness is to the left.
=0 is normal.
<0 the lower the Skewness value is the more skewness is to the right.

Formula

Legend

n = n
=Mean

External links

• http://en.wikipedia.org/wiki/Skewness
• http://www.itl.nist.gov/div898/handbook/eda/section3/eda35b.htm
• http://statistics.about.com/od/Descriptive-Statistics/a/What-Is-Skewness.htm