test.prop2

Computes a continuity-corrected z-test for a difference of population
proportions in a 2-group design. A confidence interval for a difference in
population proportions is a recommended supplement to the z-test (see
ci.prop2).

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

test.prop2 function

<dl><dt>f1</dt>
<dd>number of group 1 participants who have the attribute</dd>
<dt>f2</dt>
<dd>number of group 2 participants who have the attribute</dd>
<dt>n1</dt>
<dd>sample size for group 1</dd>
<dt>n2</dt>
<dd>sample size for group 2</dd></dl>

Arguments

Hypothesis test for a 2-group proportion difference — test.prop2

<dl>

<dt>f1</dt>
<dd>number of group 1 participants who have the attribute</dd>


<dt>f2</dt>
<dd>number of group 2 participants who have the attribute</dd>


<dt>n1</dt>
<dd>sample size for group 1</dd>


<dt>n2</dt>
<dd>sample size for group 2</dd>

</dl>

test.prop2: Hypothesis test for a 2-group proportion difference

Description

Usage

Value

Arguments

References

Examples