what test to use; the choices are
"none",
"Chisq",
"F", or
"Cp"
scale
an estimate of scale, needed for the F-test and Cp statistic
df.scale
the (residual) degrees of freedom associated with the scale estimate (as in the denominator of an F-ratio).'
n
the sample size for the data underlying the anova table.
VALUE:
a new anova table is returned, with the appropriate
statisticscolumns included. This function relies on the names of the columns being in a small subset of allowed names. It is mainly intended as a support function for
anova(),
step(),
add1() or
drop1(). Even though
stat() is a generic function,
stat.anova() is the only method to date.