groupwiseCMH: Post-hoc tests for Cochran-Mantel-Haenszel test

In rcompanion: Functions to Support Extension Education Program Evaluation

Post-hoc tests for Cochran-Mantel-Haenszel test

Description

Conducts groupwise tests of association on a three-way contingency table.

Usage

groupwiseCMH(
  x,
  group = 3,
  fisher = TRUE,
  gtest = FALSE,
  chisq = FALSE,
  method = "fdr",
  correct = "none",
  digits = 3,
  ...
)

Arguments

x	A three-way contingency table.
group	The dimension of the table to use as the grouping variable. Will be 1, 2, or 3.
fisher	If TRUE, conducts Fisher exact test.
gtest	If TRUE, conducts G test of association.
chisq	If TRUE, conducts Chi-square test of association.
method	The method to use to adjust p-values. See ?p.adjust.
correct	The correction to apply to the G test. See GTest.
digits	The number of digits for numbers in the output.
...	Other arguments passed to chisq.test or GTest.

Details

If more than one of fisher, gtest, or chisq is set to TRUE, only one type of test of association will be conducted.

Value

A data frame of groups, test used, p-values, and adjusted p-values.

Author(s)

Salvatore Mangiafico, [e-mail]

References

https://rcompanion.org/handbook/H_06.html

See Also

nominalSymmetryTest, pairwiseMcnemar, pairwiseNominalIndependence, pairwiseNominalMatrix

Examples

### Post-hoc for Cochran-Mantel-Haenszel test
data(AndersonBias)
Table = xtabs(Count ~ Gender + Result + County,
              data=AndersonBias)
ftable(Table)
mantelhaen.test(Table)
groupwiseCMH(Table,
             group   = 3,
             fisher  = TRUE,
             gtest   = FALSE,
             chisq   = FALSE,
             method  = "fdr",
             correct = "none",
             digits  = 3)
                      

rcompanion documentation built on May 29, 2024, 8:42 a.m.