see.power

see.power.tck

Provides an interactive pedagogical display of power.

graphs

Contains functions from: Aho, K. (2014) Foundational and Applied Statistics for Biologists using R.  CRC/Taylor and Francis, Boca Raton, FL, ISBN: 978-1-4398-7338-0.

Ken Aho

asbio

A Collection of Statistical Tools for Biologists

see.power function

<dl>
 <dt>alpha</dt>
<dd>Type I error.</dd> <dt>sigma</dt>
<dd>Standard deviation of underlying population.</dd> <dt>n</dt>
<dd>sample size</dd> <dt>effect</dt>
<dd>Effect size</dd> <dt>test</dt>
<dd>Type of test, one of <code>c("lower","upper","two")</code>.</dd> <dt>xlim</dt>
<dd>X-axis limits</dd>
 <dt>strict</dt>
<dd>Causes the function to use a strict interpretation of power in a two-sided test. If <code>strict = TRUE</code>
 then power for a two sided test will include the probability of rejection in the opposite tail of the true effect. If <code>strict = FALSE</code>
 (the default) power will be half the value of \(\alpha\) if the true effect size is zero.</dd></dl>

Arguments

Author

Interactive depiction of type I and type II error and power — see.power

<dl>


 <dt>alpha</dt>
<dd>Type I error.</dd>

 <dt>sigma</dt>
<dd>Standard deviation of underlying population.</dd>

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

 <dt>effect</dt>
<dd>Effect size</dd>

 <dt>test</dt>
<dd>Type of test, one of <code>c("lower","upper","two")</code>.</dd>

 <dt>xlim</dt>
<dd>X-axis limits</dd>


 <dt>strict</dt>
<dd>Causes the function to use a strict interpretation of power in a two-sided test. If <code>strict = TRUE</code>
 then power for a two sided test will include the probability of rejection in the opposite tail of the true effect. If <code>strict = FALSE</code>
 (the default) power will be half the value of \(\alpha\) if the true effect size is zero.</dd>

</dl>

see.power: Interactive depiction of type I and type II error and power

Description

Usage

Arguments

Author

Details