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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.