Number of red colonies in 100 mL source water sample
Categories
Value
Category
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
18
19
20
21
22
23
25
26
27
29
30
31
32
35
36
38
40
45
47
48
50
51
52
57
60
63
64
65
69
70
72
74
75
79
80
83
85
89
90
92
94
96
97
98
100
102
142
150
190
200
300
900
999
9999
Sysmiss
Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.