satt

Calculates pooled variance and degree of freedom using 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 does not necessarily mean incorrectness. However, many wants the same results to 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 degree of freedoms</dd> <dt>ws</dt>
<dd>a vector of weights</dd></dl>

Arguments

Author

Satterthwaite Approximation of Variance and Degree of Freedom — satt

<dl>

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

 <dt>dfs</dt>
<dd>a vector of degree of freedoms</dd>

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

</dl>

satt: Satterthwaite Approximation of Variance and Degree of Freedom

Description

Usage

Value

Arguments

Author

Details