A chemical engineer is designing the production process for a new product. The c

Question

A chemical engineer is designing the production process for a new product. The chemical reaction that produces the product may have higher or lower yield, depending on the temperature and the stirring rate in the vessel in which the reaction takes place. The engineer decides to investigate the effects of combinations of two temperatures, 60oC and 70oC, and three stirring rates, 80 rpm, 100 rpm, and 120 rpm, on the yield of the process. Batches of the feedstock will be processed at each combination of temperature and stirring rate.

(a) This experiment has two factors. What are they?

Factor 1 = _________________, Factor 2 = _________________ .

(b) What are the levels of factor 1?

(c) What are the levels of factor 2?

(d) How many treatments are there in this experiment? What are they?

(e) What is the response variable?

Explanation / Answer

a) Factor 1: The temperatures and Factor 2: the stirring rates

b) Level factor 1 = 2,

c) factor 2 = 3

d) Treatments = 2*3 = 6

60oC 80 rpm, 60oC 100 rpm, 60oC 120 rpm

70oC 80 rpm, 70oC 100 rpm, 70oC 120 rpm

e) Yield.

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