Case Study 7.2: Does it have good taste?
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Variables in the Central Composite Design
Outputs: Density, Thickness, Moisture, Flavor
Factors and Levels:
A = Screw Speed (rpm) 550 590 625 665 700
B = Base Rate (lbs) 1.5 1.7 1.9 2.1 2.3
E = Water Added (pct) 14 17 20 23 26
G = Dye Added (pct) 0.00 0.75 1.50 2.25 3.00
H = Temperature (deg. F) 240 255 270 285 300
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c72.dat:
A B E G H Density Thickness Moisture Flavor
590 1.7 17 0.75 285 197.725 0.18350 11.300 337
665 1.7 17 0.75 255 187.940 0.19565 11.175 340
590 2.1 17 0.75 255 198.290 0.21460 11.125 337
665 2.1 17 0.75 285 184.620 0.22895 11.050 339
590 1.7 23 0.75 255 303.340 0.16855 14.000 326
665 1.7 23 0.75 285 280.615 0.16540 13.600 329
590 2.1 23 0.75 285 280.265 0.19550 13.525 326
665 2.1 23 0.75 255 269.440 0.19385 13.375 329
590 1.7 17 2.25 255 218.215 0.19575 11.575 333
665 1.7 17 2.25 285 202.620 0.22005 11.125 338
590 2.1 17 2.25 285 220.495 0.22495 11.150 337
665 2.1 17 2.25 255 214.700 0.22175 11.425 339
590 1.7 23 2.25 285 312.415 0.15585 13.975 321
665 1.7 23 2.25 255 306.810 0.16190 13.775 322
590 2.1 23 2.25 255 315.135 0.18230 13.900 320
665 2.1 23 2.25 285 290.955 0.19585 13.300 325
550 1.9 20 1.50 270 265.405 0.18465 12.625 329
700 1.9 20 1.50 270 238.715 0.19395 12.200 334
625 1.5 20 1.50 270 245.055 0.15345 12.525 331
625 2.3 20 1.50 270 243.790 0.20715 12.225 331
625 1.9 14 1.50 270 167.655 0.22575 9.750 341
625 1.9 26 1.50 270 336.835 0.16625 14.575 324
625 1.9 20 0.00 270 224.930 0.18630 12.025 336
625 1.9 20 3.00 270 261.510 0.18990 13.125 331
625 1.9 20 1.50 240 255.015 0.19100 12.625 330
625 1.9 20 1.50 300 246.800 0.21305 12.275 331
625 1.9 20 1.50 270 253.840 0.18490 12.625 331
625 1.9 20 1.50 270 248.495 0.18800 12.675 333
625 1.9 20 1.50 270 237.240 0.19405 12.325 339
625 1.9 20 1.50 270 247.310 0.20325 12.600 332