ci.lc.mean.bs

Computes a test statistic and confidence interval for a linear contrast
of means. This function computes both unequal variance and equal
variance confidence intervals and test statistics. A Satterthwaite
adjustment to the degrees of freedom is used with the unequal variance
method.

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.lc.mean.bs function

<dl><dt>alpha</dt>
<dd>alpha level for 1-alpha confidence</dd>
<dt>m</dt>
<dd>vector of estimated group means</dd>
<dt>sd</dt>
<dd>vector of estimated group standard deviations</dd>
<dt>n</dt>
<dd>vector of sample sizes</dd>
<dt>v</dt>
<dd>vector of between-subjects contrast coefficients</dd></dl>

Arguments

Confidence interval for a linear contrast of means in a between-subjects
design — ci.lc.mean.bs

<dl>

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


<dt>m</dt>
<dd>vector of estimated group means</dd>


<dt>sd</dt>
<dd>vector of estimated group standard deviations</dd>


<dt>n</dt>
<dd>vector of sample sizes</dd>


<dt>v</dt>
<dd>vector of between-subjects contrast coefficients</dd>

</dl>

ci.lc.mean.bs: Confidence interval for a linear contrast of means in a between-subjects design

Description

Usage

Value

Arguments

References

Examples