Levene test for the ANOVA Assumption — levene.test • s20x

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.

Note

Deprecated in s20x 3.4.0. It will be removed in a later release.

See also

crossFactors, anova.

Examples


##
data(computer.df)
levene.test(score ~ factor(selfassess), computer.df)
#> Warning: levene.test() is deprecated and will be removed from s20x.
#>                 Df  Sum Squares  Mean Square  F-statistic  p-value   
#> Between Groups  2   54.55827     27.27914     0.24192      0.78794   
#> Within Groups   16  1804.17857   112.76116                           
#> Total           18  1858.73684