What Is Skewness And Kurtosis In Statistics Pdf. Measure of skewness gives the direction and the magnitude of the lack of symmetry whereas the kurtosis gives the idea of flatness. Its Descriptive Statistics tool in Analysis Toolpak.
Moment based measure of skewness β 1 𝜇3 2 𝜇2 3 Pearsons coefficient of skewness γ 1 β 1 Kurtosis Kurtosis refers to the degree of peakedness of a frequency curve. The skewness value can be positive or negative or even unde ned. With respect to shape virtually every textbook defines and illustrates skewness.
Skew E h X 3 i 3 3 where 3 is the third moment about the mean is the standard.
Video explaining what is Skewness and the measures of Skewness. If the distribution is not symmetric the frequencies will not be uniformly distributed about the centre of the distribution. Whereas skewness measures symmetry in a distribution kurtosis measures the heaviness of the tails or the peakedness. Skewness and kurtosis are two commonly listed values when you run a softwares descriptive statistics function.
