Statistics for Engineers and Scientists
4th Edition
ISBN: 9780073401331
Author: William Navidi Prof.
Publisher: McGraw-Hill Education
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Chapter 9.5, Problem 12E
a.
To determine
Obtain the estimates of the main effects and interaction for the solubility outcome.
b.
To determine
Plot the estimates on a normal probability plot.
Decide whether the plot shows that the factors affect the solubility and identify such factors.
c.
To determine
Obtain the estimates of the main effects and interaction for the yield outcome.
d.
To determine
Plot the estimates on a normal probability plot.
Decide whether the plot shows that the factors affect the solubility and identify such factors.
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An article in Industrial and Engineering Chemistry (“More on Planning Experiments to Increase Research Efficiency,” 1970, pp. 60-65) uses a 25-2 design to investigate the effect of A = condensation, B = amount of material 1, C = solvent volume, D = condensation time, and E = amount of material 2 on yield. The results obtained are as follows:
e =
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ad =
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cd =
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bde =
16.8
ab =
15.5
bc =
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ace =
23.4
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c. Estimate the main effects.
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e =
23.2
ad =
16.9
cd =
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16.8
ab =
15.5
bc =
16.2
ace =
23.4
abcde =
18.1
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Chapter 9 Solutions
Statistics for Engineers and Scientists
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