likelihood.test {Deducer}

Likelihood Ratio (G test) for contingency tables

Description

Performs a likelihood ratio test of independence

Usage

likelihood.test(x,y=NULL,conservative=FALSE)

Arguments

x

A vector or a matrix

y

A vector that is ignored if x is a matrix and required if x is a vector

conservative

If TRUE, the Williams' continuity correction is used

Value

A list with class "htest" containing the following components:

statistic

the value the chi-squared test statistic.

parameter

the degrees of freedom of the approximate chi-squared distribution of the test statistic.

p.value

the p-value for the test.

method

a character string indicating the type of test performed, and whether the continuity correction was used.

data.name

a character string giving the name(s) of the data.

Author(s)

Pete Hurd and Ian Fellows

See Also

chisq.test

Examples

data(InsectSprays)
likelihood.test(InsectSprays$count>7,InsectSprays$spray)