In a 2 5 ??1 design (such as the one in Exercise 12) what does the estimate
Question:
In a 25??1design (such as the one in Exercise 12) what does the estimate of the main effect of factor A actually represent?
i. The main effect of A.
ii. The sum of the main effect of A and the BCDE interaction.
iii. The difference between the main effect of A and the BCDE interaction.
iv. The interaction between A and BCDE.
Exercise 12.
The article ??An Application of Fractional Factorial Designs?? (M. Kilgo, Quality Engineering, 1988:19??23) describes a 25??1 design (half-replicate of a 25 design) involving the use of carbon dioxide (CO2) at high pressure to extract oil from peanuts. The outcomes were the solubility of the peanut oil in the CO2 (in mg oil/liter CO2), and the yield of peanut oil (in percent). The five factors were A: CO2 pressure, B: CO2 temperature, C: peanut moisture, D: CO2 flow rate, and E: peanut particle size. The results are presented in the following table.
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