norm {QuantPsyc} | R Documentation |
Skewness and Kurtosis
Description
Computes Skewness and Kurtosis of data.
Usage
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 t.d.fletcher05@gmail.com
Examples
# create negatively skewed dat with 100 observations
xc <- -rchisq(100,3)
norm(xc)
[Package QuantPsyc version 1.6 Index]