A four factor, two level design will require ___ trials to explore the interaction between factors.

2

4

8

16

An OFAT does not fully cover the experimental design space.

True

False

A _________________ design can cut the number of runs in a DOE without loosing too much information.

fractional factorial

full factorial

one factor at a time

one level at a time

The main effect of factor A, in a two factor, two level experiment, is found by computing the average response when factor A is high and then computing the average response when factor A is low. Finally the difference between the two is calculated.

True

False

The significance of the main effect can be determined by the steepness of the line in the main effects plot. The less steep is the line, the more significant is the result.

True

False