Problem 13.27 Consider a 24 agricultural experiment with four factors A, B, C, D. The experiment is to be carried out on two plots of land each of which is large enough to run only eight factor-level combinations. The scientists choose to confound the ABCD interac[1]tion with the block effect. Prepare a table, similar to Table 13.28, listing the factor-level combinations for each block. Hint: First prepare the table of contrast coefficients similar to Table 13.20.