size.ci.lc.prop.bs

Computes the sample size in each group (assuming equal sample sizes) required
to estimate a linear contrast of population proportions with desired confidence
interval precision in a between-subjects design. Set the proportion planning
values to .5 for a conservatively large sample size.
For more details, see Section 2.22 of Bonett (2021, Volume 3)

Implements confidence interval and sample size methods that are especially
useful in psychological research but are also useful in educational, social science,
business, and biological research. This package includes more than 100 confidence
interval functions and more than 80 sample size functions for 1-group, 2-group,
paired-samples, and multiple-group designs and for a variety of parameters including
means, medians, proportions, slopes, standardized mean differences, standardized
linear contrasts of means, and several measures of correlation and association. 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 about these methods 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.ci.lc.prop.bs function

<dl><dt>alpha</dt>
<dd>alpha level for 1-alpha confidence</dd>
<dt>p</dt>
<dd>vector of proportion planning values</dd>
<dt>w</dt>
<dd>desired confidence interval width</dd>
<dt>v</dt>
<dd>vector of between-subjects contrast coefficients</dd></dl>

Arguments

Sample size for a between-subjects proportion linear contrast confidence
interval — size.ci.lc.prop.bs

<dl>

<dt>alpha</dt>
<dd>alpha level for 1-alpha confidence</dd>


<dt>p</dt>
<dd>vector of proportion planning values</dd>


<dt>w</dt>
<dd>desired confidence interval width</dd>


<dt>v</dt>
<dd>vector of between-subjects contrast coefficients</dd>

</dl>

size.ci.lc.prop.bs: Sample size for a between-subjects proportion linear contrast confidence interval

Description

Usage

Value

Arguments

References

Examples