Skewness and Kurtosis
The coefficient of Skewness is a measure for the degree of symmetry in the variable distribution (Sheskin, 2011).
|Negatively skewed distribution|
or Skewed to the left
Skewness = 0
|Positively skewed distribution |
or Skewed to the right
Skewness > 0
The coefficient of Kurtosis is a measure for the degree of tailedness in the variable distribution (Westfall, 2014).
Kurtosis = 0
|Leptokurtic distribution |
Kurtosis > 0
- Sheskin DJ (2011) Handbook of parametric and nonparametric statistical procedures. 5th ed. Boca Raton: Chapman & Hall /CRC.
- Westfall PH (2014) Kurtosis as Peakedness, 1905 - 2014. R.I.P. The American Statistician 68:191-195.