Compute the number of replicates required for a completely randomized 3×4 factorial experiment. Assume we have an estimate of 25 for O (the residual standard error), we want a power of at least 0.8,...

Extracted text: Compute the number of replicates required for a completely randomized 3×4 factorial experiment. Assume we have an estimate of 25 for O (the residual standard error), we want a power of at least 0.8, use a = 0.05, and we want to be able to detect MAIN effects for the factor with the 4 levels if the difference between any two means (of this factor) exceeds 40 units.