Refer to Exercise 13.10 where the response is \(y=\) increase in particle size. Besides the first replicate, the investigators also performed the experiments that form the star part of the design.

Using all 9 measurements, fit a response surface as in Example 4.

Data From Exercise 13.10

Data From Example 4

Transcribed Image Text:

x1 X2 y -1 0 116.0 +1 0 138.0 0 -1 78.0 0 +1 118.0 0 0 97.0