Mathematics, 06.04.2021 04:40, nedy800
The percentage of hardwood concentration in raw pulp, the vat pressure, and the cooking time of the pulp are being investigated for their effects on the strength of paper. Three levels of hardwood concentration, three levels of pressure, and two cooking times are selected. A factorial experiment with two replicates is conducted, and the following data are obtained:
Percentage of hardwood Cooking time 3.0 Hours Cooking time 4.0 Hours
Concentration Pressure Pressure
n 400 500 650 400 500 650
2 196.6 197.7 199.8 198.4 199.6 200.6
196.0 196.0 199.4 198.6 200.4 200.9
198.5 196.0 198.4 197.5 198.7 199.6
197.2 196.9 197.6 198.1 198.0 199.0
197.5 195.6 197.4 197.6 197.0 198.5
196.6 196.2 198.1 198.4 197.8 199.8
A) Analyze the data and draw conclusion. Use 0.05 level of significance.
B) Prepare appropriate residual plots and comment on the model’sadequacy.
C) Under what set of conditions would you run the process? Why?
Answers: 1
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The percentage of hardwood concentration in raw pulp, the vat pressure, and the cooking time of the...
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