conover.test: Conover-Iman Test of Multiple Comparisons Using Rank Sums

Computes the Conover-Iman test (1979) for stochastic dominance and reports the results among multiple pairwise comparisons after a Kruskal-Wallis test for stochastic dominance among k groups (Kruskal and Wallis, 1952). The interpretation of stochastic dominance requires an assumption that the CDF of one group does not cross the CDF of the other. conover.test makes k(k-1)/2 multiple pairwise comparisons based on Conover-Iman t-test-statistic of the rank differences. The null hypothesis for each pairwise comparison is that the probability of observing a randomly selected value from the first group that is larger than a randomly selected value from the second group equals one half; this null hypothesis corresponds to that of the Wilcoxon-Mann-Whitney rank-sum test. Like the rank-sum test, if the data can be assumed to be continuous, and the distributions are assumed identical except for a difference in location, Conover-Iman test may be understood as a test for median difference. conover.test accounts for tied ranks. The Conover-Iman test is strictly valid if and only if the corresponding Kruskal-Wallis null hypothesis is rejected.

Author
Alexis Dinno <alexis.dinno@pdx.edu>
Date of publication
2016-01-06 23:13:19
Maintainer
Alexis Dinno <alexis.dinno@pdx.edu>
License
GPL-2
Version
1.1.1

View on CRAN

Man pages

conover.test
Conover-Iman Test
homecare
Occupation and Home Care Eligibility

Files in this package

conover.test
conover.test/NAMESPACE
conover.test/data
conover.test/data/homecare.rda
conover.test/R
conover.test/R/conover.test.R
conover.test/MD5
conover.test/DESCRIPTION
conover.test/man
conover.test/man/conover.test.Rd
conover.test/man/homecare.Rd