7. Validation
In order to validate our programs, we extracted
lower and upper critical rank sums from the
cumulative probabilities by using procedures 1
and 2 discussed in the previous section. These
values were compared with the critical rank sums
of the seven tables of the nonparametric two-sample
test in the Eighth Edition of Geigy’s Scientific
Tables [7]. In this context it should be noted that
earlier editions of Geigy’s tables should not be
used for such comparisons, since the Eighth Edition
has been the result of a critical revision of
earlier versions.
No differences in the values of critical rank
sums between the results from our programs and
those in Geigy’s Eighth Edition were found.