Which is correct and most complete according to the chapter?

a. Editing models involves adding terms to regression models.

b. If only a single acceptability check is possible, PRESS might be the best.

c. If the response is fraction nonconforming, large batch sizes can help make residuals more normally distributed.

d. With mixture factors, some terms in a full polynomial must be dropped.

e. All of the above are correct.

f. All of the above are correct except

(a) and (e).