levene_test | R Documentation |
levene_test
Calculates the Levene's test for homogeneity
of variance across groups, model coefficients, the
variance-covariance matrix and the degrees of freedom.
levene_test(y, x, formula, data)
y |
numeric (continuous) response variable. |
x |
categorical group variable. |
formula |
A formula object to specify the model as normally used by glm. Use 'factor' to define the grouping x variable. Only one variable is allowed. |
data |
An objects of class |
The Levene's test centers on group means to calculate outcome residuals, the Brown-Forsythe test on the median.
An object from which the following objects are extracted:
fstats
F-test value, including numerator and
denominator degrees of freedom.
qhat
model coefficients.
vcov
variance-covariance matrix.
dfcom
degrees of freedom obtained from df.residual
.
Martijn Heymans, 2021
with.milist
, pool_levenetest
, bf_test
imp_dat <- df2milist(lbpmilr, impvar="Impnr") ra <- with(imp_dat, expr=levene_test(Pain ~ factor(Carrying)))
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