*! version 1.1.0 7Mars2013
help qn (Wouter Gelade, Vincenzo Verardi and Catherine Vermandele)

Title

qn -- Rousseeuw and Croux (1993) robust measure of dispersion

Syntax

qn varname [if] [in]

Description

qn Estimates Qn, a robust measure of dispersion

When estimating dispersion parameters, please see [R] summarize for classical estimators.

Examples

Setup

webuse auto

Estimating measure of dispersion Qn

qn price

Saved results

qn saves the following in e():

Scalars

e(qn) The Qn dispersion statistic

Functions

e(sample) The sample identifier

References

Rousseeuw, Peter J.; Croux, Christophe (December 1993), "Alternatives to the Median Absolute Deviation"
Journal of the American Statistical Association 88(424): 1273–1283.

Also see

Manual: [R] summarize