ci.2x2.mean.ws

Computes confidence intervals and tests for the AB interaction effect,
main effect of A, main effect of B, simple main effects of A, and simple main
effects of B in a 2x2 within-subjects design with a quantitative response
variable.

Implements confidence interval and sample size methods that
are especially useful in psychological research. The methods can be
applied in 1-group, 2-group, paired-samples, and multiple-group designs
and to a variety of parameters including means, medians, proportions,
slopes, standardized mean differences, standardized linear contrasts
of means, plus several measures of correlation and association.
Confidence interval and sample size functions are given for single
parameters as well as differences, ratios, and linear contrasts of
parameters. 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 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.2x2.mean.ws function

<dl><dt>alpha</dt>
<dd>alpha level for 1-alpha confidence</dd>
<dt>y11</dt>
<dd>vector of scores at level 1 of A and level 1 of B</dd>
<dt>y12</dt>
<dd>vector of scores at level 1 of A and level 2 of B</dd>
<dt>y21</dt>
<dd>vector of scores at level 2 of A and level 1 of B</dd>
<dt>y22</dt>
<dd>vector of scores at level 2 of A and level 2 of B</dd></dl>

Arguments

Computes tests and confidence intervals of effects in a 2x2 within-subjects
design for means — ci.2x2.mean.ws

<dl>

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


<dt>y11</dt>
<dd>vector of scores at level 1 of A and level 1 of B</dd>


<dt>y12</dt>
<dd>vector of scores at level 1 of A and level 2 of B</dd>


<dt>y21</dt>
<dd>vector of scores at level 2 of A and level 1 of B</dd>


<dt>y22</dt>
<dd>vector of scores at level 2 of A and level 2 of B</dd>

</dl>

ci.2x2.mean.ws: Computes tests and confidence intervals of effects in a 2x2 within-subjects design for means

Description

Usage

Value

Arguments

Examples