GRAECO-LATIN SQUARE (3 BY 3) NUMBER OF FACTORS = 4 NUMBER OF LEVELS FOR EACH FACTOR = 3 NUMBER OF OBSERVATIONS = 9 REFERENCE--BOX, HUNTER, AND HUNTER, STATISTICS FOR EXPERIMENTERS, PAGE 261 NOTE--THIS DESIGN IS EQUIVALENT TO A 3**(4-2) FRACTIONAL FACTORIAL DESIGN AND A TAGUCHI L9 DESIGN. NOTE--IF POSSIBLE, THIS (AS WITH ALL EXPERIMENT DESIGNS) SHOULD BE RUN IN RANDOM ORDER (TO ASSIST IN THIS RANDOMIZATION, SEE DATAPLOT'S REFERENCE FILES OF RANDOM PERMUTATIONS). NOTE--FACTOR X1 BELOW IS THE PRIMARY FACTOR OF INTEREST FACTOR X2 BELOW IS NUISANCE/BLOCKING FACTOR #1 FACTOR X3 BELOW IS NUISANCE/BLOCKING FACTOR #2 FACTOR X4 BELOW IS NUISANCE/BLOCKING FACTOR #3 NOTE--AN ASSUMPTION IN USING A GRAECO-LATIN SQUARE IS THAT NO INTERACTIONS EXIST AMONG ANY OF THE 4 FACTORS NOTE--TO READ THIS FILE INTO DATAPLOT-- SKIP 50 READ GRLATSQ3.DAT X1 TO X4 DATE--MAY 1989 X1 X2 X3 X4 --------------- 1 1 1 1 2 1 2 3 3 1 3 2 2 2 1 2 3 2 2 1 1 2 3 3 3 3 1 3 1 3 2 2 2 3 3 1