size.test.slope.gen {statpsych} | R Documentation |
Sample size for a slope hypothesis test in a general statistical model
Description
Computes the sample size required to test a null hypothesis with desired power that a population slope coefficient in any general statistical is equal to zero. This function requires a standard error estimate for the slope of interest from a prior or pilot study and the sample size that was used in the prior or pilot study.
Usage
size.test.slope.gen(alpha, pow, se, n0, b)
Arguments
alpha |
alpha level for 1-alpha confidence |
pow |
desired power |
se |
standard error of slope from prior/pilot study |
n0 |
sample size used in prior/pilot study |
b |
planning value of population slope |
Value
Returns the required sample size
Examples
size.test.slope.gen(.05, .8, 3.15, 50, 5)
# Should return:
# Sample size
# 156
[Package statpsych version 1.7.0 Index]