Description Usage Arguments Details Value References Examples
Tests for Constancy of Error Variance between two group
1 |
fit |
model of regression |
group |
vector, determine two group |
alpha |
Type I error level |
length group and number of observations should be equal
test statistic, p.value, alpha and degree of freedom
Michael H. Kutner; Christopher J. Nachtsheim; John Neter; William Li. Applied Linear Statistical Models Fifth Edition .page 116
1 2 3 4 5 6 7 8 | ################### EXAMPLE PAGE 117
### Group
g<-rep(1,25)
g[TolucaCompany$x<=70]=0
### TEST
bftest(lm(y~x,TolucaCompany),g)
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