1THIS IS DATAPLOT DATA FILE HALD647.DAT 2HEAT YIELD IN HARDENING OF PORTLAND CEMENT 3REFERENCE--HALD, A., STATISTICAL THEORY WITH ENGINEERING 4 APPLICATIONS, WILEY, NEW YORK, 1952, PAGE 647. 5REFERENCE--DANIEL, CUTHERBERT, AND WOOD, FRED S. 6 FITTING EQUATIONS TO DATA, WILEY, NEW YORK, 1971, 7 PAGES 89 AND 100. 8NUMBER OF OBSERVATIONS = 13 9NUMBER OF VARIABLES PER LINE IMAGE = 5 10ORDER OF VARIABLES PER LINE IMAGE-- 11 RESPONSE VARIABLE Y = HEAT EVOLVED (CAL/GRAM OF CEMENT) 12 FACTOR 1 = CONCENTRATION OF COMPOUND 1 13 FACTOR 2 = CONCENTRATION OF COMPOUND 2 14 FACTOR 3 = CONCENTRATION OF COMPOUND 3 15 FACTOR 4 = CONCENTRATION OF COMPOUND 4 16STATISTICAL CLASSIFICATION--REGRESSION 17 ALL-POSSIBLE SUBSETS REGRESSION 18TO READ THIS INTO DATAPLOT-- 19SKIP 25 20READ HALD647.DAT Y X1 X2 X3 X4 21 22 HEAT CONC CONC CONC CONC 23YIELD 1 2 3 4 24 25----------------------------- 26 78.5 7 26 6 60 27 74.3 1 29 15 52 28104.3 11 56 8 20 29 87.6 11 31 8 47 30 95.9 7 52 6 33 31109.2 11 55 9 22 32102.7 3 71 17 6 33 72.5 1 31 22 44 34 93.1 2 54 18 22 35115.9 21 47 4 26 36 83.8 1 40 23 34 37113.3 11 66 9 12 38109.4 10 68 8 12 39