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In this video I explain two formulas for calculating skew: Pearson's Median Skewness or Pearson's 2nd equation for skew, and the Adjusted Fisher-Pearson Standardized 3rd Moment Coefficient for skew. I also explain some general guidelines for interpreting skew values, as well as some caveats for drawing conclusions.
Doane & Seward (2011) Measuring Skewness: A Forgotten Statistic?
jse.amstat.org/v19n2/doane.pdf