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The percentage of hardwood concentration in raw pulp, the vat pressure, and the cooking time of...

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Question

Basic Math

  1. The percentage of hardwood concentration in raw pulp, the vatpressure, and the cooking time of the pulp are being investigatedfor their effects on the strength of paper. Three levels ofhardwood concentration, three levels of pressure, and two cookingtimes are selected. A factorial experiment with two replicates isconducted, and the following data are obtained: (Use a=0.05 unlessotherwise specified)

Percentage

Cooking

Time

3.0 hrs.

Cooking

Time

4.0 hrs

of Hardwood

Pressure

Pressure

Concentration

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

4

198.5

196.0

198.4

197.5

198.7

199.6

197.2

196.9

197.6

198.1

198.0

199.0

8

197.5

195.6

197.4

197.6

197.0

198.5

196.6

196.2

198.1

198.4

197.8

199.8

  1. Analyze the full model and check for significance
  2. Reduce your model
  3. Check the adequacy of this model
  4. Under what conditions would you run the process

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