ci.spcor

Computes a Fisher confidence interval for a population semipartial
correlation. This function requires an (unadjusted) estimate of the
squared multiple correlation in the full model that contains the
predictor variable of interest plus all control variables. This
function computes a modified Aloe-Becker confidence interval that uses
n - 3 rather than n in the standard error and also uses a Fisher
transformation of the semipartial correlation.
For more details, see Section 2.7 of Bonett (2021, Volume 2)

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.spcor function

<dl><dt>alpha</dt>
<dd>alpha level for 1-alpha confidence</dd>
<dt>cor</dt>
<dd>estimated semipartial correlation</dd>
<dt>r2</dt>
<dd>estimated squared multiple correlation in full model</dd>
<dt>n</dt>
<dd>sample size</dd></dl>

Arguments

Confidence interval for a semipartial correlation — ci.spcor

<dl>

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


<dt>cor</dt>
<dd>estimated semipartial correlation</dd>


<dt>r2</dt>
<dd>estimated squared multiple correlation in full model</dd>


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

</dl>

ci.spcor: Confidence interval for a semipartial correlation

Description

Usage

Value

Arguments

References

Examples