satt

Calculates the pooled variance and degrees of freedom using the Satterthwaite equation.

This is a core implementation of 'SAS' procedures for linear models - GLM, REG, ANOVA, TTEST, FREQ, and UNIVARIATE. Some R packages provide Type II and Type III SS. However, the results of nested and complex designs are often different from those of 'SAS'. Different results do not necessarily mean incorrectness. However, many want the same results as 'SAS'. This package aims to achieve that.
Reference: Littell RC, Stroup WW, Freund RJ (2002, ISBN:0-471-22174-0).

Kyun-Seop Bae

sasLM

'SAS' Linear Model

satt function

<dl> <dt>vars</dt>
<dd>a vector of variances</dd> <dt>dfs</dt>
<dd>a vector of degrees of freedom</dd> <dt>ws</dt>
<dd>a vector of weights</dd></dl>

Arguments

Author

Satterthwaite Approximation of Variance and Degrees of Freedom — satt

<dl>

 <dt>vars</dt>
<dd>a vector of variances</dd>

 <dt>dfs</dt>
<dd>a vector of degrees of freedom</dd>

 <dt>ws</dt>
<dd>a vector of weights</dd>

</dl>

satt: Satterthwaite Approximation of Variance and Degrees of Freedom

Description

Usage

Value

Arguments

Author

Details