This is Dataplot data file CORNEL69.DAT
Effect of Plastizers on Automobile Vinyl Thickness
3-Factor Constrained Mixture (Non-Simplex Region)
Extreme Vertex Design + Edge Points + Centroid
Source--Cornell, John A. (1990). ASQC Statistics
Division Volume 5: How to Run Mixture Experiments
for Product Quality. Page 69 (Table 13).
Response Variable = vinyl thickness
Number of observations = 9
Number of variables per line image = 5 (= 2 + 3)
Order of variables per line image--
Response variable 1 = vinyl thickness (replication 1)
Response variable 2 = vinyl thickness (replication 2)
Factor 1 = plasticizer 1
Factor 2 = plasticizer 2
Factor 3 = plasticizer 3
Project Question--What settings for the 3 plasticiers
maximize the vinyl thickness?
Statistical areas--mixture design of experiment
To read this file into Dataplot--
SKIP 95; READ CORNELL62.DAT Y1 Y2 X1 X2 X3
Y1 Y2 X1 X2 X3
Thickness Thickness Plasticizer Plasticizer Plasticizer
Rep 1 Rep 2 1 (proport) 2 (proport) 3 (proport)
---------------------------------------------------------
8 7 .8490 .0000 .1510
4 6 .7260 .0000 .2740
12 10 .4740 .2520 .2740
13 10 .5970 .2520 .1510
18 21 .6615 .1260 .2125
12 -99 .7875 .0000 .2125
13 -99 .6000 .1260 .2740
16 -99 .5355 .2520 .2125
14 -99 .7230 .1260 .1510