pi.score.ps

For a 2-level within-subjects experiment, this function computes a
prediction interval for how the response variable score for one randomly
selected person from the study population would differ under the two
treatment conditions.
For more details, see Section 4.5 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

pi.score.ps function

<dl><dt>alpha</dt>
<dd>alpha level for 1-alpha confidence</dd>
<dt>m1</dt>
<dd>estimated mean for measurement 1</dd>
<dt>m2</dt>
<dd>estimated mean for measurement 2</dd>
<dt>sd1</dt>
<dd>estimated standard deviation for measurement 1</dd>
<dt>sd2</dt>
<dd>estimated standard deviation for measurement 2</dd>
<dt>cor</dt>
<dd>estimated correlation of paired scores</dd>
<dt>n</dt>
<dd>sample size</dd></dl>

Arguments

Prediction interval for difference of scores in a 2-level within-subjects
experiment — pi.score.ps

<dl>

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


<dt>m1</dt>
<dd>estimated mean for measurement 1</dd>


<dt>m2</dt>
<dd>estimated mean for measurement 2</dd>


<dt>sd1</dt>
<dd>estimated standard deviation for measurement 1</dd>


<dt>sd2</dt>
<dd>estimated standard deviation for measurement 2</dd>


<dt>cor</dt>
<dd>estimated correlation of paired scores</dd>


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

</dl>

pi.score.ps: Prediction interval for difference of scores in a 2-level within-subjects experiment

Description

Usage

Value

Arguments

References

Examples