power.prop1 {statpsych} | R Documentation |
Approximates the power of a one-sample proportion test for a planned sample size
Description
Computes the approximate power of a one-sample proportion test for a planned sample size. Set the proportion planning value to .5 for a conservatively low power estimate. The value of the effect size need not be based on the proportion planning value.
Usage
power.prop1(alpha, n, p, es)
Arguments
alpha |
alpha level for hypothesis test |
n |
planned sample size |
p |
planning value of proportion |
es |
planning value of proportion minus hypothesized value |
Value
Returns the approximate power of the test
Examples
power.prop1(.05, 40, .5, .2)
# Should return:
# Power
# 0.715613
[Package statpsych version 1.5.0 Index]