R Graphical Manual

Browse All

Last data update: 2014.03.03

R: Exact Sign Test with Confidence Intervals

signTest

R Documentation

Exact Sign Test with Confidence Intervals

Description

Uses binom.exact to create sign test with confidence intervals.

Usage

signTest(x,  stat = c("pos-neg", "prop pos"), ...)

Arguments

`x`	numeric vector
`stat`	statistic for estimates and confidence intervals, "pos-neq"= proportion positive - proportion negative, "prop pos"= proportion positive (all proportions are out of non-zero values)
`...`	arguments passed to `binom.exact`

Details

Exact sign test, using exact binomial test on the proportion positive out of the non-zero values.

Value

A list of class 'htest'

Note

The sign test can be interpreted as a test that the median is zero assuming continuous data. If you want to test on the median without making continuity assumptions use medianTest.

Author(s)

Michael P. Fay

Examples

x<-c(rep(-1,10),rep(0,60),rep(1,30))
signTest(x)
# sample median is zero, 
# and not surprisingly the median test 
# properly gives a large p-value
medianTest(x)