To be more precise:
1/2 = ((Pts in games 12-22) - (Pts in games 1-11)) / 22
Team 1-11 12-22 Pts Dif 1/2
Brown 4-7-0 7-2-2 +8 +.364
Clarkson 7-3-1 9-1-1 +4 +.182
St. Lawrence 3-7-1 5-5-1 +4 +.182
Dartmouth 3-7-1 4-5-2 +3 +.136
RPI 5-4-2 6-3-2 +2 +.091
Vermont 3-6-2 4-5-2 +2 +.091
Union 2-8-1 2-7-2 +1 +.045
Harvard 5-5-1 5-6-0 -1 -.045
Yale 9-2-0 8-2-1 -1 -.045
Princeton 4-4-3 3-5-3 -2 -.091
Cornell 6-4-1 3-8-0 -7 -.318
Colgate 8-3-0 1-7-3 -11 -.500