= "geometric mean"</code>. This parameter
is always <code>FALSE</code> for all other values of <code>fnctl</code>.</p></dd>


<dt>useFdstn</dt>
<dd><p>a logical indicator
that the F distribution should be used for test statistics instead of the
chi squared distribution even in logistic regression
models. When using the F distribution, the degrees of freedom are taken to
be the sample size minus the number of parameters, as it would be in a
linear regression model.</p></dd>


<dt>suppress</dt>
<dd><p>if <cod