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

b and c appear to be high as well as ac interaction but negatively.

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) + , + , -