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TABLE 8.

ORDINATES TO NORMAL CURVE OF DISTRIBUTION on a scale whose unit = the Probable Error,
and in which the 100 Grades run from 0° to 100'.

 Grades 0 1 2 3 4 5 6 7 8 9 0 -m -3.45 -3.05 -2.79 -2.60 -2.44 -2-31 -2.19 -2.08 -1.99 10 -1-90 -1.82 -1.74 -1.67 -1.60 -1-54 -1.47 -1.42 -1.36 -1,30 20 -1.25 -1-20 -1.15 -1.10 -1.05. -1.00 -0-95 -0-91 -0-86 -0-82 30 -0-78 -0.74 -0.69 -0-65 -0.61 -0.57 -0.53 -0-49 -0.45 -0.41 40 -0.38 -0.34 -0.30 -0-26 -0.22 -0'19 -0-15 -0.11 -0.07 -0.04 50 0.00 +0.04 +0-07 +0.11 +0'15 +0.19 +0-22 +0.26 -0.30 +0.34 60 +0-38 +0-41 +0.45 +0-49 +0.53 +0.57 +0-61 +0-65 +0-69 +0-74 70 +0-78 +0-82 +0-86 +0.91 +0-95 +1-00 +1-05 +1.10 +1.15 +1.20 80 +1-25 +1-30 +1-36 +1- 42 +1-47 +1-54 +1-60 +1-67 +1-74 +1-82 90 +1-90 +1-99 +2.08 +2-19 +2.31 +2'44 +2.60 +2.79 +3.05 +3-45

Examples of the way in which Table 8 is to be read :

The ordinate at 0° is -infinity; at 10° it is -1'90 ; at 11° it is -1'82 ; at 25° it is -1'00 ; at 75° it is +1'00. The Table does not go beyond Grade 99°, where the ordinate is + 3'45. At the Grade 100', the ordinate would be + infinity.