On Tue, 16 May 2000 15:21:34 GMT, [EMAIL PROTECTED] wrote:
> Is it possible to compare two unrelated groups of samples using
> Hartley's F-max? In other words if I have two groups of samples, can I
> use Hartley's F-max to compare their "heterogeneity" without taking
> into account their respective means?
>
Hartley's F-max may be used before a one-way ANOVA; you take the
largest variance over the smallest to make an F, to test variances as
homogeneous. It is not a good test for qualifying an ANOVA, since it
is more sensitive to non-Normality than the ANOVA is.
What you do mean when you say, "I have two groups of samples"? ....
How does this differ from having one large group of samples?
Hartley's will *always* take into account the respective means, in
the sense that the variance are computed around individual means; I
don't know what your comment means, " ... without taking into account
their respective means."
--
Rich Ulrich, [EMAIL PROTECTED]
http://www.pitt.edu/~wpilib/index.html
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