Levene's Test
Provide a pipe-friendly framework to easily compute Levene's test for homogeneity of variance across groups.
Wrapper around the function leveneTest(), which can
additionally handles a grouped data.
levene_test(data, formula, center = median)
data |
a data frame for evaluating the formula or a model |
formula |
a formula |
center |
The name of a function to compute the center of each group; mean gives the original Levene's test; the default, median, provides a more robust test. |
a data frame with the following columns: df1, df2 (df.residual), statistic and p.
# Prepare the data
data("ToothGrowth")
df <- ToothGrowth
df$dose <- as.factor(df$dose)
# Compute Levene's Test
df %>% levene_test(len ~ dose)
# Grouped data
df %>%
group_by(supp) %>%
levene_test(len ~ dose)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.