THIS IS DATAPLOT DESIGN OF EXPERIMENT FILE PB28.DAT PLACKETT-BURMAN 28-RUN DESIGN NUMBER OF LEVELS FOR EACH FACTOR = 2 NUMBER OF FACTORS = 27 NUMBER OF RUNS = 28 (A SATURATED DESIGN) RESOLUTION = 3 (CAUTION! MAIN EFFECTS COUNFOUNDED WITH 2-TERM INTERACTIONS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CONFOUNDING STRUCTURE-- AN 27-FACTOR DESIGN HAS 27*26/2 = 351 2-TERM INTERACTIONS. THE CONFOUNDING FOR THIS DESIGN IS SEVERE-- EACH MAIN EFFECT IS EQUI-CONFOUNDED WITH ALL 351-26 = 325 2-TERM INTERACTIONS NOT INVOLVING THE FACTOR ITSELF; THUS, FOR EXAMPLE, THE ESTIMATED FACTOR 1 EFFECT IS EQUI-CONFOUNDED WITH ALL 351 2-TERM INTERACTIONS EXCEPT FOR THOSE 26 WHICH INVOLVE FACTOR 1 (NAMELY, 1x2, 1x3, ..., 1x27). CONVERSELY, IF A GIVEN 2-TERM INTERACTION IS REAL & LARGE, THEN IT WILL EQUI-CONFOUND/CONTAMINATE 25 OF THE 27 MAIN EFFECTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . NOTE--IF POSSIBLE, THIS (AS WITH ALL EXPERIMENT DESIGNS) DESIGN SHOULD BE RUN IN RANDOM ORDER. NOTE--TO READ THIS FILE INTO DATAPLOT-- DIMENSION 30 VARIABLES SKIP 50 READ PB28.DAT X1 TO X23 X X X X X X X X X X X X X X X X X X X X X X X X X X X 1 2 3 4 5 6 7 8 9 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 -------------------------------------------------------------------- 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 2 2 1 2 2 1 1 2 2 2 2 1 1 1 1 1 1 1 1 2 2 2 2 1 1 2 2 1 1 1 2 1 1 2 2 1 2 1 1 2 1 2 1 2 1 2 2 1 2 1 1 2 2 1 2 2 2 2 1 2 2 1 1 2 2 2 2 1 1 1 1 1 1 1 1 2 2 2 2 1 1 1 2 1 1 1 2 1 1 2 2 1 2 1 1 2 1 2 1 2 1 2 2 1 2 1 1 2 2 1 1 2 2 2 1 2 2 1 1 2 2 2 2 1 1 1 1 1 1 1 1 2 2 2 2 1 1 2 2 1 1 1 2 1 1 2 2 1 2 1 1 2 1 2 1 2 1 2 2 1 2 1 2 2 2 1 1 2 2 2 1 2 2 1 1 2 2 2 2 1 1 1 1 1 1 1 1 2 2 1 2 1 1 2 2 1 1 1 2 1 1 2 2 1 2 1 1 2 1 2 1 2 1 2 2 1 2 2 2 2 2 1 1 2 2 2 1 2 2 1 1 2 2 2 2 1 1 1 1 1 1 1 1 1 2 1 2 1 1 2 2 1 1 1 2 1 1 2 2 1 2 1 1 2 1 2 1 2 1 2 2 1 1 2 2 2 2 1 1 2 2 2 1 2 2 1 1 2 2 2 2 1 1 1 1 1 1 1 1 2 2 1 2 1 1 2 2 1 1 1 2 1 1 2 2 1 2 1 1 2 1 2 1 2 2 1 1 1 1 2 2 2 2 1 1 2 2 2 1 2 2 1 1 2 2 2 2 1 1 1 1 1 1 2 1 2 2 1 2 1 1 2 2 1 1 1 2 1 1 2 2 1 2 1 1 2 1 2 2 1 1 1 1 1 1 2 2 2 2 1 1 2 2 2 1 2 2 1 1 2 2 2 2 1 1 1 1 2 1 2 1 2 2 1 2 1 1 2 2 1 1 1 2 1 1 2 2 1 2 1 1 2 2 1 1 1 1 1 1 1 1 2 2 2 2 1 1 2 2 2 1 2 2 1 1 2 2 2 2 1 1 2 1 2 1 2 1 2 2 1 2 1 1 2 2 1 1 1 2 1 1 2 2 1 2 1 2 2 2 1 1 1 1 1 1 1 1 2 2 2 2 1 1 2 2 2 1 2 2 1 1 2 2 1 2 1 1 2 1 2 1 2 1 2 2 1 2 1 1 2 2 1 1 1 2 1 1 2 2 1 2 2 2 2 2 1 1 1 1 1 1 1 1 2 2 2 2 1 1 2 2 2 1 2 2 1 1 1 2 1 2 1 1 2 1 2 1 2 1 2 2 1 2 1 1 2 2 1 1 1 2 1 1 2 2 1 1 2 2 2 2 1 1 1 1 1 1 1 1 2 2 2 2 1 1 2 2 2 1 2 2 1 1 2 2 1 2 1 1 2 1 2 1 2 1 2 2 1 2 1 1 2 2 1 1 1 2 1 2 2 2 1 1 2 2 2 2 1 1 1 1 1 1 1 1 2 2 2 2 1 1 2 2 2 1 1 2 1 1 2 2 1 2 1 1 2 1 2 1 2 1 2 2 1 2 1 1 2 2 1 1 1