ci.var.upper

Computes an upper confidence limit for a population variance using an
estimated variance from a sample of size n in a prior study. The upper limit
can be used as a variance planning value in sample size functions for
desired power that require a planning value of the population variance.
For more details, see Section 1.31 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.var.upper function

<dl><dt>alpha</dt>
<dd>alpha value for 1-alpha confidence (one-sided)</dd>
<dt>var</dt>
<dd>estimated variance</dd>
<dt>n</dt>
<dd>sample size</dd></dl>

Arguments

Upper confidence limit of a variance — ci.var.upper

<dl>

<dt>alpha</dt>
<dd>alpha value for 1-alpha confidence (one-sided)</dd>


<dt>var</dt>
<dd>estimated variance</dd>


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

</dl>

ci.var.upper: Upper confidence limit of a variance

Description

Usage

Value

Arguments

References

Examples