
Chapter 18
PB
Non-Parametric Statistics
761
Step 6: Analyse the data
The test statistic U can be computed as in Table 18.3.
TABLE 18.3
Weekly compensation (in rupees) of production and marketing
department employees with ranks and respective groups
Weekly compensation Rank Group
4800 1 P
4900 2 P
4930 3 P
4960 4 M
4990 5 M
5000 6 P
5020 7 M
5100 8 P
5150 9 M
5170 10 M
5200 11 P
5220 12 P
5250 13 M
5300 14 P
5350 15 M
5500 16 M
5600 17 M
R
1
= 1 + 2 + 3 + 6 + 8 + 11 + 12 + 14 = 57
R
2
= 4 + 5 + 7 + 9 + 10 + 13 + 15 + 16 + 17 = 96
Unn
nn
R
112
11
1
1
89
88 1
57 51=+
−=×+
+
()
()
Unn
nn
R
212
22
2
1
89
99 1
96 21=+
−=×+
+
()
()
When we compare U
1
and U
2
, we nd that U
2