Re: Some "elementary" issues -

[Richard A. Beldin, Ph.D.]

The question of compatibility of two data sets is not answered by
statistical tests. Two data sets are compatible if the "same procedure" was
used for each. Any evidence of differences between the data sets is
attributed either to differences between the material or differences between
the actual procedures used in either case. No electronic database with
automated procedures can answer such questions. A careful review of the
observational procedures is where we start.

Dick