WRS2 (version 1.0-0)

med2way: A two-way ANOVA for medians.

Description

This function computes a two-way ANOVA medians with interactions effects.

Usage

med2way(formula, data)

Arguments

formula

an object of class formula.

data

an optional data frame for the input data.

Value

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

Details

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.

References

Wilcox, R. (2012). Introduction to Robust Estimation and Hypothesis Testing (3rd ed.). Elsevier.

See Also

t2way, med1way

Examples

# NOT RUN {
med2way(attractiveness ~ gender*alcohol, data = goggles)
mcp2a(attractiveness ~ gender*alcohol, data = goggles, est = "median")
# }

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