VIIL—MEASURES OF DISPERSION, ETC. 7 
CALOULATION OF THE STANDARD DEVIATION: Example i.—Caleulation of 
Mean and Standard Deviation for a Short Series of Observations un- 
grouped. Estimated Average Weekly Earnings of Agricultural Labourers 
in Thirty-eight Rural Unions, in 1892-3. (W. Little: Labour Com- 
mission; Report, vol. v., part i., 1894.) 
2. 2 
Lion ne Difference (Difference)? 
and Pence). § (Pence). £. 
Ss. d; 
1. Glendale . ; ’ ; 20 9 58 3,364 
2. Wigton . ; 20 3 52 2,704 
Garstang h 19. 2 | 45 2,025 
. Belper . : 1? ‘ 961 
. Nantwich . : 1. 441 
. Atcham \ 17 ¥ 361 
+8 Driffield . . 170 196 
.. Uttoxeter . ‘ 175. 169 
9, Wetherby . h 17 0 169 
10. Easingwold . 16 11 144 
11. Southwell . . ; 16. 6 4: 
12, Hollingbourn . : 16 4 < 
13. Melton Mowbray . 16 = : 
14. Truro : : . 16 ] 
15. Godstone . . 8 
16. Louth ’ ] . 13 
17. Brixworth . . 3 
18. Crediton |, . i) 
19. Holbeach , \ 1) $y 
20. Maldon \ 19 on 
21. Monmouth : 1) J 
22. St Neots . 15 ol 
23. Swaffham |, : 15 1zi 
24. Thakeham . . i5 121 
25. Thame . ) 150 121 
26. Thingoe . j 15 ¢ 121 
27. Basingstoke . 1500 121 
28. Cirencester : . 1576 121 
29. N.Witchford . 14 169 
30. Pewsey . . d 14% 196 
31. Bromyard . : : 14 . 196 
32, Wantago . : : 14 196 
33. Stratford-on-Avon . 14 256 
34. Dorchester . ; 14 3 289 
35. Woburn : ’ 14 289 
36. Buntingford . 1+ i 361 
37. Pershore . . . 21 841 
38. Langport . s iz 4 1.681 
"oo, +300 
: tl 605 3 l Eo + 16,018 
13, 
1. ” ' 
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