wilcoxon.mann.whitney {ANSM5} | R Documentation |
Perform Wilcoxon-Mann-Whitney test
Description
wilcoxon.mann.whitney()
performs the Wilcoxon-Mann-Whitney test and is used in chapters 6, 8, 9 and 12 of "Applied Nonparametric Statistical Methods" (5th edition)
Usage
wilcoxon.mann.whitney(
x,
y,
H0 = NULL,
alternative = c("two.sided", "less", "greater"),
cont.corr = TRUE,
CI.width = 0.95,
max.exact.cases = 1000,
nsims.mc = 1e+05,
seed = NULL,
do.asymp = FALSE,
do.exact = TRUE,
do.mc = FALSE,
do.CI = TRUE
)
Arguments
x |
Numeric vector, or factor with same levels as y |
y |
Numeric vector, or factor with same levels as x |
H0 |
Null hypothesis value (defaults to |
alternative |
Type of alternative hypothesis (defaults to |
cont.corr |
Boolean indicating whether or not to use continuity correction (defaults to |
CI.width |
Confidence interval width (defaults to |
max.exact.cases |
Maximum number of cases allowed for exact calculations (defaults to |
nsims.mc |
Number of Monte Carlo simulations to be performed (defaults to |
seed |
Random number seed to be used for Monte Carlo simulations (defaults to |
do.asymp |
Boolean indicating whether or not to perform asymptotic calculations (defaults to |
do.exact |
Boolean indicating whether or not to perform exact calculations (defaults to |
do.mc |
Boolean indicating whether or not to perform Monte Carlo calculations (defaults to |
do.CI |
Boolean indicating whether or not to perform confidence interval calculations (defaults to |
Value
An ANSMtest object with the results from applying the function
Examples
# Examples 6.1 and 6.2 from "Applied Nonparametric Statistical Methods" (5th edition)
wilcoxon.mann.whitney(ch6$groupA, ch6$groupB)
# Exercise 12.4 from "Applied Nonparametric Statistical Methods" (5th edition)
wilcoxon.mann.whitney(ch12$feedback.satisfaction[ch12$PPI.person.2 == "Representative"],
ch12$feedback.satisfaction[ch12$PPI.person.2 == "Researcher"],
do.exact = FALSE, do.asymp = TRUE)