skewness_kurtosis {PlotNormTest} | R Documentation |
Sample skewness and Sample Kurtosis.
Description
Sample skewness and Sample Kurtosis.
Usage
kurtosis(x)
skewness(x)
Arguments
x |
univariate data sample |
Details
Sample kurtosis is
\hat{\kappa}_4 =
\dfrac{1}{n-1} \sum_{i = 1}^n \left(\dfrac{X_i - \bar{X}}{S}\right)^4.
Sample skewness is
\hat{\kappa}_3 =
\dfrac{1}{n-1} \sum_{i = 1}^n \left(\dfrac{X_i - \bar{X}}{S}\right)^3.
Value
kurtosis
returns sample kurtosis.
skewness
returns sample skewness.
Examples
set.seed(123)
y <- rnorm(100)
kurtosis(y)
set.seed(123)
x <- rnorm(100)
skewness(x)
[Package PlotNormTest version 1.0.1 Index]