power.prop1.test {MKpower} | R Documentation |
Power Calculations for One-Sample Test for Proportions
Description
Compute the power of the one-sample test for proportions, or determine parameters to obtain a target power.
Usage
power.prop1.test(n = NULL, p1 = NULL, p0 = 0.5, sig.level = 0.05,
power = NULL,
alternative = c("two.sided", "less", "greater"),
cont.corr = TRUE, tol = .Machine$double.eps^0.25)
Arguments
n |
number of observations (per group) |
p1 |
expected probability |
p0 |
probability under the null hypothesis |
sig.level |
significance level (Type I error probability) |
power |
power of test (1 minus Type II error probability) |
alternative |
one- or two-sided test. Can be abbreviated. |
cont.corr |
use continuity correction |
tol |
numerical tolerance used in root finding, the default providing (at least) four significant digits. |
Details
Exactly one of the parameters n
, p1
, power
, and
sig.level
must be passed as NULL, and that parameter is determined
from the others. Notice that sig.level
has a non-NULL default
so NULL
must be explicitly passed if you want it computed.
The computation is based on the asymptotic formulas provided in Section 2.5.1
of Fleiss et al. (2003). If cont.corr = TRUE
a continuity correction
is applied, which may lead to better approximations of the finite-sample
values.
Value
Object of class "power.htest"
, a list of the arguments
(including the computed one) augmented with method
and
note
elements.
Note
The documentation was adapted from power.prop.test
.
Author(s)
Matthias Kohl Matthias.Kohl@stamats.de
References
J.L. Fleiss, B. Levin and M.C. Paik (2003). Statistical Methods for Rates and Proportions. Wiley Series in Probability and Statistics.
See Also
Examples
power.prop1.test(p1 = 0.4, power = 0.8)
power.prop1.test(p1 = 0.4, power = 0.8, cont.corr = FALSE)
power.prop1.test(p1 = 0.6, power = 0.8)
power.prop1.test(n = 204, power = 0.8)
power.prop1.test(n = 204, p1 = 0.4, power = 0.8, sig.level = NULL)
power.prop1.test(n = 194, p1 = 0.4, power = 0.8, sig.level = NULL,
cont.corr = FALSE)
power.prop1.test(p1 = 0.1, p0 = 0.3, power = 0.8, alternative = "less")
power.prop1.test(p1 = 0.1, p0 = 0.3, power = 0.8, alternative = "less",
cont.corr = FALSE)
power.prop1.test(n = 31, p0 = 0.3, power = 0.8, alternative = "less")
power.prop1.test(n = 31, p1 = 0.1, p0 = 0.3, power = 0.8, sig.level = NULL,
alternative = "less")
power.prop1.test(p1 = 0.5, p0 = 0.3, power = 0.8, alternative = "greater")
power.prop1.test(p1 = 0.5, p0 = 0.3, power = 0.8, alternative = "greater",
cont.corr = FALSE)
power.prop1.test(n = 40, p0 = 0.3, power = 0.8, alternative = "greater")
power.prop1.test(n = 40, p1 = 0.5, p0 = 0.3, power = 0.8, sig.level = NULL,
alternative = "greater")