ci.lc.stdmean.ws

Computes confidence intervals for two types of population standardized
linear contrast of means (unweighted standardizer and level 1 standardizer)
in a within-subjects design. Equality of variances is not assumed, but the
correlations among the repeated measures are assumed to be approximately
equal.
For more details, see Section 4.7 of Bonett (2021, Volume 1)

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

ci.lc.stdmean.ws function

<dl><dt>alpha</dt>
<dd>alpha level for 1-alpha confidence</dd>
<dt>m</dt>
<dd>vector of estimated means for levels of within-subjects factor</dd>
<dt>sd</dt>
<dd>vector of estimated standard deviations for levels of within-subjects factor</dd>
<dt>cor</dt>
<dd>average estimated correlation of all measurement pairs</dd>
<dt>n</dt>
<dd>sample size</dd>
<dt>q</dt>
<dd>vector of within-subjects contrast coefficients</dd></dl>

Arguments

Confidence interval for a standardized linear contrast of means in a
within-subjects design — ci.lc.stdmean.ws

<dl>

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


<dt>m</dt>
<dd>vector of estimated means for levels of within-subjects factor</dd>


<dt>sd</dt>
<dd>vector of estimated standard deviations for levels of within-subjects factor</dd>


<dt>cor</dt>
<dd>average estimated correlation of all measurement pairs</dd>


<dt>n</dt>
<dd>sample size</dd>


<dt>q</dt>
<dd>vector of within-subjects contrast coefficients</dd>

</dl>

ci.lc.stdmean.ws: Confidence interval for a standardized linear contrast of means in a within-subjects design

Description

Usage

Value

Arguments

References

Examples