A pharmaceutical manufacturer is designing an experiment to test four different capsule ingredients designed to reduce dissolution time. Each ingredient will be tested at 10 milligrams and 40 milligrams. A full factorial design is used with five replications per run. The number of levels, factors and runs is, respectively:
Answer(s): A
(Refer to the previous problem) The variance of the five replications for each run is calculated. Most of these variances are approximately equal but two are significantly lower than the others. The experimenters would be especially interested in those two runs if they want to optimize:
Answer(s): D
(Refer to the previous problem) To estimate the within treatment variance the experimenters would calculate the variances of:
Answer(s): B
An experiment has seven factors with two levels each. The experiment has eight runs. This experimental design is called:
The principle disadvantage of fractional factorial experiments is that:
Answer(s): C
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