prop.trend.test {stats}

R Documentation

Test for trend in proportions

Description

Performs chi-squared test for trend in proportions, i.e., a test asymptotically optimal for local alternatives where the log odds vary in proportion with score. By default, score is chosen as the group numbers.

Usage

prop.trend.test(x, n, score = 1:length(x))

Arguments

x	Number of events
n	Number of trials
score	Group score

Value

An object of class "htest" with title, test statistic, p-value, etc.

Note

This really should get integrated with prop.test

Author(s)

Peter Dalgaard

See Also

prop.test

Examples

smokers  <- c( 83, 90, 129, 70 )
patients <- c( 86, 93, 136, 82 )
prop.test(smokers, patients)
prop.trend.test(smokers, patients)
prop.trend.test(smokers, patients,c(0,0,0,1))

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