Statistical Functions

Measures of Central Tendency

Function	Description
mean	Arithmetic mean
median	Median (middle) value
mode	Most frequent value
trimmean	Trimmed mean (mean, excluding outliers)
geomean	Geometric mean
harmean	Harmonic mean

Measures of Spread

Function	Description
range	Range of values (largest minus smallest)
std	Standard deviation
var	Variance
mad	Mean absolute deviation
iqr	Interquartile range (75th percentile minus 25th percentile)

Measures of Shape

Function	Description
skewness	Skewness (third central moment)
kurtosis	Kurtosis (fourth central moment)
moment	Central moment of arbitrary order