ci.slope

Computes a confidence interval for a population slope coefficient in a
simple linear model using the sample correlation, sample standard
deviation of the y scores (response variable), sample standard deviation
of the x scores (predictor variable), and sample size as input.
For more details, see Section 1.11 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.slope function

<dl><dt>alpha</dt>
<dd>alpha level for 1-alpha confidence</dd>
<dt>cor</dt>
<dd>estimated Pearson correlation</dd>
<dt>sdy</dt>
<dd>estimated standard deviation of response variable</dd>
<dt>sdx</dt>
<dd>estimated standard deviation of predictor variable</dd>
<dt>n</dt>
<dd>sample size</dd></dl>

Arguments

Confidence interval for a slope in a simple linear model — ci.slope

<dl>

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


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


<dt>sdy</dt>
<dd>estimated standard deviation of response variable</dd>


<dt>sdx</dt>
<dd>estimated standard deviation of predictor variable</dd>


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

</dl>

ci.slope: Confidence interval for a slope in a simple linear model

Description

Usage

Value

Arguments

References

Examples