Unformatted text preview: dditive model. ANSWER: D
‟s are assumed independent and normally distributed with mean 0 and variance
(cf. p. 421) . 9. Which of the following statements is not true?
A. In a twofactor experiment there are I levels of one factor and J levels of the other factor.
When there are more than one observation for each pair of the IJ combinations of levels of 2 of 7 IOE 366 Fall 2012
Practice
the two factors, a valid estimator of the random error variance 2 cannot be obtained without
assuming additivity.
B. In a twofactor experiment, additivity means that the difference in true average responses for
any two levels of one of the factors is the same for each level of the other factor.
C. The parameters for the fixed effects model with interaction are
the effect of factor A at
level i,
the effect of factor B at level j, and
the interaction of factor A at level i and
factor B at level j. Thus, the model is i...
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This note was uploaded on 04/04/2013 for the course IOE 366 taught by Professor Game during the Winter '08 term at University of Michigan.
 Winter '08
 GAME

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