Editorial 
529 
which has most likely been observed, then the result should be divided by the 
number in the column entitled mode %ja to obtain the most reasonable value for a. 
For example, if 2 be observed, and n = 20, then the most reasonable value to give a 
is 2/-9487. 
The paper by Mr Fisher and the accompanying table more or less complete 
the work on the distribution of standard-deviations outlined by " Student " in 
1908. 
Table of Values of the Constants of the Freqmiicy Distribution of the Standard 
Deviations of Samples drawn at ra.ndom from a Normal Population. 
Size oi 
Sample 
n 
Mode 
Mean 
S/o- 
Standard Deviation 
Measures of Deviation from 
Normality 
2,' 
Skewness 
h 
•7071 
•7979 
•3367 
■9524 
•2696 
■2359 
3^1082 
5 
■7746 
•8407 
•3052 
■9651 
•2168 
•1646 
3-0593 
6' 
•8165 
•8686 
■2808 
•9725 
•1857 
•1255 
3-0370 
7 
•8452 
•8882 
•2612 
•9774 
•1648 
•1011 
3^0251 
8 
•8660 
•9027 
■2452 
•9808 
•1495 
•0845 
3-0181 
9 
•8819 
•9139 
•2318 
•9834 
•1378 
•0725 
3-0136 
10 
•8944 
•9227 
•2203 
■9853 
•1285 
•0634 
3-0106 
11 
■9045 
•9300 
•2104 
•9868 
•1209 
■0564 
3-0085 
12 
•9129 
•9359 
•2017 
•9881 
•1144 
•0507 
3^0070 
13 
•9199 
•9410 
•1940 
■9891 
•1088 
■0461 
3^0059 
u 
•9258 
•9453 
•1871 
•9900 
•1041 
•0422 
3^0049 
15 
•9309 
•9490 
•1809 
•9907 
•0998 
■0390 
3^0042 
16 
•9354 
•9523 
•1752 
•9914 
■0961 
■0362 
3^0036 
17 
•9393 
•9551 
•1701 
•9919 
•0927 
■0337 
3^0032 
18 
•9428 
•9576 
•1654 
•9924 
•0897 
■0316 
3^0028 
19 
•9459 
■9599 
•1611 
•9928 
•0869 
•0297 
3-0025 
20 
■9487 
•9619 
•1570 
•9932 
■0844 
•0281 
3-0022 
25 
•9592 
•9696 
•1407 
•9948 
•0745 
•0219 
3-0014 
30 
•9661 
■9748 
•1285 
•9956 
•0674 
•0180 
3-0009 
35 
•9710 
•9784 
•1191 
•9963 
•0620 
•0153 
3-0007 
40 
•9747 
■9811 
•1114 
•9967 
•0577 
•0132 
3-0005 
45 
•9775 
•9832 
•1051 
•9977 
•0541 
•0117 
3-0004 
50 
•9798 
■9849 
•0997 
•9974 
•0512 
•0105 
3-0003 
55 
•9816 
■9863 
•0951 
•9977 
•0488 
■0095 
3-0003 
60 
•9832 
■9874 
•0911 
•9979 
•0467 
•0087 
3-0002 
65 
•9845 
■9884 
•0875 
•9980 
•0447 
•0080 
3-0002 
70 
•9856 
•9892 
•0844 
•9982 
•0430 
•0074 
3-0002 
75 
•9866 
•9900 
•0815 
•9983 
•0415 
•0069 
3-0001 
80 
•9874 
•9906 
•0789 
•9984 
•0402 
■0064 
3-0001 
85 
•9882 
•9911 
■0766 
•9985 
•0389 
•0060 
S^OOOl 
90 
•9888 
■9916 
■0744 
•9986 
■0378 
•0057 
3-0001 
95 
•9894 
■9921 
■0725 
•9987 
■0367 
•0054 
3-0001 
100 
■9899 
■9925 
•0706 
•9987 
■0358 
•0051 
3-0000 
