“…If this assumption be made with the adjacent duplicate plats (Table 32), the actual error of these group means exceeded their probable error approximately 0,1,2,3,4,5,6,7,8,10,11,and 15 times respectively in 9,5,7,7,8,4,4,1,2,1,1,and 1 groups. (See Col. 11,Table 32).…”