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 ungrouped.
 Estimated Average Weekly Earnings of Agricultural Labourers
in Thirty-eight Rural Unions, in 1892-3. (W. Little: Labour Commission;
 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

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