A two-way ANOVA for medians.
This function computes a two-way ANOVA medians with interactions effects.
med2way(formula, data)
formula |
an object of class formula. |
data |
an optional data frame for the input data. |
There should not be too many ties in the data. The test statistics for the main effects in med2way are F-distributed, the (heteroscedastic) test for the interaction is chi-square distributed. Post hoc tests can be performed using
mcp2a.
Returns an object of class t2way containing:
Qa |
first main effect |
A.p.value |
p-value first main effect |
Qb |
second main effect |
B.p.value |
p-value second main effect |
Qab |
interaction effect |
AB.p.value |
p-value interaction effect |
call |
function call |
varnames |
variable names |
dim |
design dimensions |
Wilcox, R. (2012). Introduction to Robust Estimation and Hypothesis Testing (3rd ed.). Elsevier.
med2way(attractiveness ~ gender*alcohol, data = goggles) mcp2a(attractiveness ~ gender*alcohol, data = goggles, est = "median")
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