ind hw#15
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Individual Homework #15Design and Analysis of ExperimentsCarlos A. Peroza
Pr 0.
A B AB y- - + 16+ - - 11- + - 18+ + + 9
A effect = (11+9)/2-(16+18)/2 = -7B effect = (18+9)/2+(16+11)/2 = 0AB effect = (16+9)/2-(11+18)/2 = -2
The model regression coefficients are 1/2 the effect values.
6.1
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b and c appear to be high as well as ac interaction but negatively.
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Anova table confirms that the factors mentioned above are significant c) y (hours)= 40.83 + 5.66*B + 3.41*C – 4.41*AC
d)
Residuals are normally distributed and with a constant variance. There seem to be no problem with NID(0.σ).
e) + , + , -