prop.trend.test
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 = seq_along(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
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))
Copyright (©) 1999–2012 R Foundation for Statistical Computing.
Licensed under the GNU General Public License.