Suppose that a 22 design has been conducted. There are four replicates and the experiment has been conducted in four blocks. The error sum of squares is 500 and the block sum of squares is 250. If the experiment had been conducted as a completely randomized design, the estimate of the error variance ????

2 would be

(a) 25.0

(b) 25.5

(c) 35.0

(d) 38.5

(e) none of the above 7.29 The block effect in a two-level design with two blocks can be calculated directly as the difference in the average response between the two blocks.

(a) True

(b) False