levene.test: Levene test for the ANOVA Assumption

In s20x: Functions for University of Auckland Course STATS 201/208 Data Analysis

Levene test for the ANOVA Assumption

Description

Perform a Levene test for equal group variances in both one-way and two-way ANOVA. A table with the results is (normally) displayed.

Usage

levene.test(formula, data, digit = 5, show.table = TRUE)

Arguments

formula	a symbolic description of the model to be fitted: response ~ fac1 + fac2.
data	an optional data frame containing the variables in the model.
digit	the number of decimal places to display.
show.table	If this argument is FALSE then the output will be suppressed

Value

A list with the following elements:

df	degrees of freedom.
ss	sum squares.
ms	mean squares.
f.value	F-statistic value.
p.value	P-value.

See Also

crossFactors, anova.

Examples

##
data(computer.df)
levene.test(score ~ factor(selfassess), computer.df)

s20x documentation built on Aug. 21, 2023, 5:07 p.m.