language_test

A dataset with scores from 8 students who failed a high school test and could not get their diploma. They repeated the exam and got new scores.

datasets

In repeated measures studies with extreme large or small values it is common
that the subjects measurements on average are closer to the mean of the basic population.
Interpreting possible changes in the mean in such situations can lead to biased results
since the values were not randomly selected, they come from truncated sampling.
This method allows to estimate the range of means where treatment effects are likely to occur
when regression toward the mean is present.
Ostermann, T., Willich, Stefan N. & Luedtke, Rainer. (2008). Regression toward the mean - a detection method for unknown population mean based on Mee and Chua's algorithm. BMC Medical Research Methodology.<doi:10.1186/1471-2288-8-52>.

Daniela Recchia

regtomean

Regression Toward the Mean

Thomas Ostermann

language_test function

A data frame with 8 observations on the following 9 variables.<dl>
 <dt><code>Student</code></dt>
<dd>a numeric vector</dd> <dt><code>Before</code></dt>
<dd>a numeric vector</dd> <dt><code>After</code></dt>
<dd>a numeric vector</dd> <dt><samp>Total N</samp></dt>
<dd>a numeric vector</dd> <dt><code>Cross</code></dt>
<dd>a numeric vector</dd> <dt><samp>Pre-treatment Mean</samp></dt>
<dd>a numeric vector</dd> <dt><samp>Pre-treatment Std</samp></dt>
<dd>a numeric vector</dd> <dt><samp>Post-treatment Mean</samp></dt>
<dd>a numeric vector</dd> <dt><samp>Post-treatment Std</samp></dt>
<dd>a numeric vector</dd> 
</dl>

Format

Language Test in High School — language_test

A data frame with 8 observations on the following 9 variables.<dl>
 <dt><code>Student</code></dt>
<dd>a numeric vector</dd>

 <dt><code>Before</code></dt>
<dd>a numeric vector</dd>

 <dt><code>After</code></dt>
<dd>a numeric vector</dd>

 <dt><samp>Total N</samp></dt>
<dd>a numeric vector</dd>

 <dt><code>Cross</code></dt>
<dd>a numeric vector</dd>

 <dt><samp>Pre-treatment Mean</samp></dt>
<dd>a numeric vector</dd>

 <dt><samp>Pre-treatment Std</samp></dt>
<dd>a numeric vector</dd>

 <dt><samp>Post-treatment Mean</samp></dt>
<dd>a numeric vector</dd>

 <dt><samp>Post-treatment Std</samp></dt>
<dd>a numeric vector</dd>

 
</dl>

language_test: Language Test in High School

Description

Usage

Arguments

Format

Examples