levene.test {car}R Documentation

Levene's Test

Description

Computes Levene's test for homeogeneity of variance across groups.

Usage

levene.test(y, group)

Arguments

y response variable.
group factor defining groups.

Value

returns an object meant to be printed showing the results of the test.

Note

adapted from a response posted by Brian Ripley to the R-help email list.

Author(s)

John Fox jfox@mcmaster.ca

References

Fox, J. (1997) Applied Regression, Linear Models, and Related Methods. Sage.

Examples

attach(Moore)
levene.test(conformity, fcategory)
## Levene's Test for Homogeneity of Variance
##       Df F value Pr(>F)
## group  2   0.046 0.9551
##       42  

levene.test(conformity, interaction(fcategory, partner.status))
## Levene's Test for Homogeneity of Variance
##       Df F value Pr(>F)
## group  5  1.4694 0.2219
##       39
[Package car version 1.2-1 Index]