Calculate excess kurtosis from a vector

Calculates the excess kurtosis of a vector

kurtosis(x)

Arguments

x	vector of values

Value

numeric value of kurtosis

Details

Note that this calculates the 'excess kurtosis', which is defined as kurtosis - 3. This statistic is used in the calculation of the standard deviation of sample variance in the function sd.var. Additional details

References

NIST/SEMATECH e-Handbook of Statistical Methods, http://www.itl.nist.gov/div898/handbook/eda/section3/eda35b.htm, 2011-06-20.