ci.lc.stdmean.bs

Computes confidence intervals for a population standardized linear contrast
of means in a between-subjects design. The unweighted standardizer is
recommended in experimental designs. The weighted standardizer is
recommended in nonexperimental designs with simple random sampling. The
group 1 standardizer is useful in both experimental and nonexperimental
designs. Equality of variances is not assumed. If the group 1 standardizer
is used, group 1 would typically be a control group or a comparison group.
For more details, see Section 3.4 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.lc.stdmean.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 deviation</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 standardized linear contrast of means in a
between-subjects design — ci.lc.stdmean.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 deviation</dd>


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


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

</dl>

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

Description

Usage

Value

Arguments

References

Examples