When factors A and B are fixed but factor C is random and the restricted model is used (see the footnote on page 438; there is a technical complication with the unrestricted model here), and E(MSE) = σ2
a. Based on these expected mean squares, what F ratios would you use to test
for all i, j; and ?
b. In an experiment to assess the effects of age, type of soil, and day of production on compressive strength of cement/soil mixtures, two ages (A), four types of soil (B), and 3 days (C, assumed random) were used, with L = 2 observations made for each combination of factor levels. The resulting sums of squares were
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