Variances of Differences between Means when there are Two Missing Values in Randomized Block Designs

table for computing purposes. Let x and w represent estimates of the missing plot values in the hth block and in the ith treatment and in the kth block and the jth treatment. Let Ylm represent the known value in the lth block and the mth treatment (1 : h when m = i and 1 0 k when m = j). Let Bh and Bk represent respectively the totals of the known values in the hth and kth blocks and let Ti and T3 represent 42 -