Applied Statistics and Probability for Engineers

14-20

(0, 0) ( , 0)

(0, )

(–1, –1)

(–1, +1)

x 2

x 1

(+1, –1)

(+1, +1)

x 2

(– , 0) x^1

(0, – )

x 2

α

α

α

α

Figure S14-14 Central composite designs for k2 and k3.

Figure S14-13 Overlay of yield and viscosity response surfaces,

Example S14-4.

48.00

158.0

50.33 52.67 55.00 57.33 59.67 62.00

160.3

162.7

165.0

167.3

169.7

1 172.0

• 1

x^2

(temperature)

x 1 (time)

• 1+1 0

0

Viscosity

Viscosity 42.00

38.00

Conversion

69.00

PQ220 6234F.CD(14) 5/9/02 8:40 PM Page 20 RK UL 6 RK UL 6:Desktop Folder:TEMP WORK:MONTGOMERY:REVISES UPLO D CH114 FIN L: