TABLES 
TABLE 3 
SQUARES OF DIFFERENCES 
From o to 80 by Halves (See pages 178-179) 
Square of Square of Square of Square of 
Difference Difference Difference Difference Difference Difference Difference Difference 
0 0 20 400.00 40 1600.00 60 3600.00 
0.5 0.25 20.5 420.25 40.5 1640.25 60.5 3660. 25 
I 1.00 21 441.00 41 1681.00 61 3721.00 
1.5 2.25 21.5 462.25 41.5 1722.25 61.5 3782.25 
2 4.00 22 484.00 42 1764.00 62 3844.00 
2.5 6.25 22.5 500.25 42.5 1806.25 62.5 3906.25 
3 9.00 23 529.00 43 1849.00 63 3969.00 
3.5 12.25 23.3 552.25 43.5 1892.25 63.5 4032.25 
3 16.00 24 576.00 44 1036.00 64 4096.00 
3.5 20.25 24.5 600.25 44.5 1980.25 64.5 4160.25 
3 25.00 25 625.00 45 2025.00 65 4225.00 
5.5 30.25 25.5 650.25 45.5 2070.25 65.5 4290.25 
. 36.00 26 676.00 46 2116.00 66 4356.00 
t.5 42.25 26.5 702.25 46.5 2162.25 66.5 4422.25 
2 49.00 27 729.00 47 2209.00 67 4489.00 
7:5 56.25 27.5 756.25 47.5 2256.25 67.5 4556.25 
8 64.00 28 784.00 48 2304.00 68 4624.00 
8.5 72.25 28.5 B12.25 48.5 2352.25 68.5 4602.25 
Gu 81.00 29 841.00 49 2401.00 69 4761.00 
9.5 00.25 20.5 870.25 49.5 2450.25 69.5 4830.25 
10 100.00 30 000.00 50 2500.00 70 4900.00 
10.5 110.25 30.5 030.25 50.5 2550.25 70.5 4970.25 
Ix 121.00 3I 961.00 51 2601.00 71 5041.00 
11.5 132.25 31.5 092.25 51.5 2652.25 21.5 S1X2.25 
[2 144.00 32 1024.00 52 2704.00 73 5184.00 
[2.5 156.25 32.5 1056.25 52.5 2756.25 12.8 5250.25 
3 169.00 33 1089.00 53 2809.00 73 5320.00 
13.5 182.25 33.5 1122.25 53.5 2862.25 73.5 5402.25 
14 196.00 34 1156.00 54 2016.00 74 5476.00 
14.5 210.25 34.5 1190.25 54.5 2070.25 74.5 5550.25 
Is 225.00 35 [225.00 55 3025.00 75 5625.00 
15.5 240.25 35.5 1260.25 55.5 3080.25 75.5 5700.25 
16 256.00 36 1296.00 56 3136.00 76 5776.00 
16.5 272.25 36.5 1332.25 56.5 3192.25 76.5 5852.25 
x7 280.00 37 1369.00 57 3249.00 77 5020.00 
17.5 306.25 37.5 1406.25 57.5 3306.25 77.5 6006.25 
8 324.00 38 1444.00 58 3364.00 78 6084.00 
18.5 342.25 38.5 1482.25 58.5 3422.25 78.5 6162.25 
9 361.00 39 1521.00 50 3481.00 79 6241.00 
19.5 380.25 39.5 1560.25 59.5 3540.25 79.5 6320.25 
Decimals may be entirely disregarded without appreciably affecting the resulting correla- 
tion coefficients. The error is never greater than .02, and is usually much less. 
251