ERROR TO CASES OF NORMAL DISTRIBUTION AND CORRELATION. 159 
Table V.-—Table for Calculation of Probable Error. 
This taljle gives Q\/N in terms of N, where Q = '67448975 .. and N lias any 
value. I'he values of N in the first column are the values corresponding to values of 
Qv^N intermediate between those in the second column. Thus Qv/N = 93'5 gives 
N = 19216, and Q\/N = 94'5 gives N = 19630 ; and therefore for any value of N 
between 19216 and 19630 the value of Qv^N to the nearest integer is 94. The 
figures in N are arranged in pairs, since the result of dividing \/N by 10 is to divide 
N by 100. Thus for N = '01 93 00 the value of Qv^N to three places of decimals is 
'094 ; and similarly, if N = '00 00 01 93, Qv^N = '00094, correct to five places of 
decimals. Thus the table gives Q\/N within from '8 to '08 per cent, of its value, 
without the necessity for any interpolation. This is accurate enough for ordinary 
purposes. 
N. 
QCn. 
N. 
Qv/N. 
N. 
Qv/N. 
00 97 21 
067 
01 56 95 
085 
02 30 94 
103 
01 00 15 
068 
60 69 
086 
35 47 
104 
03 14 
069 
64 47 
087 
40 04 
105 
06 17 
070 
68 29 
088 
! 44 66 
106 
09 25 
071 
72 16 
089 
49 32 
107 
12 37 
072 
76 07 
090 
54 02 
108 
15 54 
073 
80 03 
091 
58 77 
109 
18 75 
074 
84 03 
092 
63 56 
110 
22 00 
075 
88 08 
093 
68 39 
111 i 
25 30 
076 
92 16 
094 
73 27 
1 
112 ' 
^ 28 64 
077 
96 30 
095 
78 20 
113 
32 02 
078 
02 00 47 
096 
83 17 
114 
35 45 
079 
04 69 
097 
88 18 
115 
38 93 
080 
08 96 
098 
93 23 
116 
42 44 
081 
13 27 
099 
98 33 
117 
16 00 
082 
17 62 
100 
03 03 48 
118 ' 
49 61 
083 
22 01 
101 
08 66 
119 
53 26 
084 
26 45 
102 
13 90 
i 
120 ! 
