Skewness and Kurtosis

Description

Computes Skewness and Kurtosis of data.

Usage

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norm(x)
Skew(x)
Kurt(x)

Arguments

x

A data object such as a numeric or column from a data.frame

Value

norm returns a table containing Skew & Kurt. Each contain the following elements:

Statistic

value for Skewness or Kurtosis respectively

SE

Standard error for Skewness or Kurtosis

t-val

t or z ratio - Statistic/SE

p

p value associated with z distribution

Warning

These statistics should be used with caution as they are influenced by sample size!

Author(s)

Thomas D. Fletcher tom.fletcher.mp7e@statefarm.com

Examples

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# create negatively skewed dat with 100 observations
xc <-  -rchisq(100,3)	
norm(xc)