size.test.sign

Computes the sample size required for a 1-group sign test with desired
power (see size.test.sign.ps for a paired-samples sign test). The Sign
test is a test of the null hypothesis that the population median is equal
to some specified value. This null hypothesis can also be expressed in
terms of the proportion of scores in the population that are greater than
the hypothesized population median value. Under the null hypothesis, this
proportion is equal to .5. This function requires a planning value of this
population proportion.

Implements confidence interval and sample size methods that
are especially useful in psychological research. The methods can be
applied in 1-group, 2-group, paired-samples, and multiple-group designs
and to a variety of parameters including means, medians, proportions,
slopes, standardized mean differences, standardized linear contrasts
of means, plus several measures of correlation and association.
Confidence interval and sample size functions are given for single
parameters as well as differences, ratios, and linear contrasts of
parameters. The sample size functions can be used to approximate the
sample size needed to estimate a parameter or function of parameters
with desired confidence interval precision or to perform a variety of
hypothesis tests (directional two-sided, equivalence, superiority,
noninferiority) with desired power. For details see: Statistical Methods
for Psychologists, Volumes 1 – 4, <https://dgbonett.sites.ucsc.edu/>.

Douglas G. Bonett

statpsych

Statistical Methods for Psychologists

Robert J. Calin-Jageman

size.test.sign function

<dl><dt>alpha</dt>
<dd>alpha level for hypothesis test</dd>
<dt>pow</dt>
<dd>desired power</dd>
<dt>p</dt>
<dd>planning value of proportion</dd></dl>

Arguments

Sample size for a 1-group sign test — size.test.sign

<dl>

<dt>alpha</dt>
<dd>alpha level for hypothesis test</dd>


<dt>pow</dt>
<dd>desired power</dd>


<dt>p</dt>
<dd>planning value of proportion</dd>

</dl>

size.test.sign: Sample size for a 1-group sign test

Description

Usage

Value

Arguments

Examples