7/28/2019 Design and Analysis of Experiments Homeworks HW#20

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Individual Homework #20

Design and Analysis of Experiments

8.6

7/28/2019 Design and Analysis of Experiments Homeworks HW#20

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Residuals looks normally distributed with constant variance.

7/28/2019 Design and Analysis of Experiments Homeworks HW#20

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The model can be reduced to a 22 design by eliminating factor A.

7/28/2019 Design and Analysis of Experiments Homeworks HW#20

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Factors B and C are significant as predicted by the normal probability

plot. However the interaction between B and C is not significant. In

6.1 B, C and theinteraction between B:C were significant. In this

fractional design the interaction between B and C is confounded with

blocks and therefore not possible to separate.

8.9

a) B and C seem to be active

7/28/2019 Design and Analysis of Experiments Homeworks HW#20

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b) Model including 3 factors A, B, C and Block. Residuals look

normal meeting the assumptions of normal distribution and

constant varinace.

c)The design was collapsed into a 23

design with A, B, C and Block asthe active factors. None of the factors resulted significant.

7/28/2019 Design and Analysis of Experiments Homeworks HW#20

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7/28/2019 Design and Analysis of Experiments Homeworks HW#20

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Previuos design collapsed into 22 desing with factors B and C as

active. Only Intercept resulted significant.

None of the factors that appeared to be active is significant.