agricolae (version 1.0-4)

waerden.test: Multiple comparisons. The van der Waerden (Normal Scores)

Description

A nonparametric test for several independent samples.

Usage

waerden.test(y, trt, alpha=0.05, group=TRUE, main=NULL)

Arguments

y

Variable response

trt

Treatments

alpha

Significant level

group

TRUE or FALSE

main

Title

Value

• y
  Numeric
• trt
  factor
• alpha
  Numeric
• group
  Logic
• main
  text

Details

The data consist of k samples of posibly unequal sample size.

References

Practical Nonparametrics Statistics. W.J. Conover, 1999

See Also

kruskal

Examples

library(agricolae)
# example 1
data(corn)
attach(corn)
comparison<-waerden.test(observation,method,group=TRUE)
comparison<-waerden.test(observation,method,group=FALSE)
# example 2
data(sweetpotato)
attach(sweetpotato)
comparison<-waerden.test(yield,virus,alpha=0.01,group=TRUE)