prop.trend.test {ctest} | R Documentation |
Performs chi-square 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.
prop.trend.test(x, n, score=1:length(x))
x |
Number of events |
n |
Number of trials |
score |
Group score |
An object of class htest
with title, test statistic, p-value, etc.
This really should get integrated with prop.test
Peter Dalgaard
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))