TAGUCHI L9 ORTHOGONAL DESIGN NUMBER OF FACTORS = 4 NUMBER OF LEVELS FOR EACH FACTOR = 3 NUMBER OF OBSERVATIONS = 9 REFERENCE--TAGUCHI, SYS. OF EXP. DES., VOL. 2, PAGE 1153. NOTE--THIS DESIGN IS EQUIVALENT TO A 3**(4-2) FRACTIONAL FACTORIAL DESIGN. REFERENCE--BARKER, QUALITY BY EXP. DESIGN, PAGES 74-87. NOTE--THIS DESIGN IS EQUIVALENT TO A 3 X 3 LEVEL GRAECO-LATIN SQUARE. REFERENCE--BOX, HUNTER & HUNTER, STAT. FOR EXP., PAGE 261. 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--TO READ THIS FILE INTO DATAPLOT-- SKIP 25 READ L9.DAT X1 TO X4 DATE--JUNE 1988 X1 X2 X3 X4 ----------- 1 1 1 1 1 2 2 2 1 3 3 3 2 1 2 3 2 2 3 1 2 3 1 2 3 1 3 2 3 2 1 3 3 3 2 1