skewness

noun

Etymology: Etymology tree English skew Proto-Germanic *-in- Proto-Indo-European *-h₂ Proto-Indo-European *-éh₂ Proto-Indo-European *-yéti Proto-Indo-European *-eh₂yéti Proto-Indo-European *-h₂ti Proto-Germanic *-ōną Proto-Germanic *-inōną Proto-Indo-European *-dyé- Proto-Germanic *-atjaną Proto-Indo-European *-tus Proto-Germanic *-þuz Proto-Germanic *-assuz Proto-Germanic *-inassuz Proto-West Germanic *-nassī Old English -nes Middle English -nesse English -ness English skewness From skew + -ness.

1. The property of being skew.

   “A very effective area where we can apply feature engineering is by looking at the skewness of data and then correcting the skewness through normalization of the data. Skewness can be visualized by plotting the data using histograms and density plots.”

2. A measure of the asymmetry of the probability distribution of a real-valued random variable; is the third standardized moment, defined as scriptstyle γ₁=(μ₃)/(σ³),! where μ₃ is the third moment about the mean and σ is the standard deviation.