satt {sasLM}

Satterthwaite Approximation of Variance and Degree of Freedom

Description

Calculates pooled variance and degree of freedom using Satterthwaite equation.

Usage

  satt(vars, dfs, ws=c(1, 1)) 

Arguments

vars

a vector of variances

dfs

a vector of degree of freedoms

ws

a vector of weights

Details

The input can be more than two variances.

Value

Variance

approximated variance

Df

degree of freedom

Author(s)

Kyun-Seop Bae [e-mail]