ztest.1samp {powertools} | R Documentation |
Power calculation for one-sample z test
Description
This function performs power and sample size calculations for a one-sample z test which is analogous to a one-sample t test with the variance assumed to be known. This function is provided largely for pedagogical purposes; in general, for real studies, the one-sample t test procedure should be used.
Usage
ztest.1samp(
N = NULL,
delta = NULL,
sd = 1,
alpha = 0.05,
power = NULL,
sides = 2,
v = FALSE
)
Arguments
N |
The sample size. |
delta |
muA (the true mean) - mu0 (the mean under the null). |
sd |
The standard deviation; defaults to 1. |
alpha |
The significance level (type 1 error rate); defaults to 0.05. |
power |
The specified level of power. |
sides |
Either 1 or 2 (default) to specify a one- or two- sided hypothesis test. |
v |
Either TRUE for verbose output or FALSE (default) to output computed argument only. |
Value
A list of the arguments (including the computed one).
Examples
ztest.1samp(N = NULL, delta = 6.5 - 5.7, sd = 2, power = 0.8, sides = 2)
ztest.1samp(N = 40, delta = NULL, sd = 1, power = 0.9, sides = 2)
ztest.1samp(N = NULL, delta = 0.6, sd = 1, power = 0.8, sides = 1)
[Package powertools version 0.1.3 Index]