Number of blue 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
17
18
19
20
21
22
24
25
26
27
29
30
36
37
40
41
42
48
50
52
59
62
65
67
69
72
75
78
80
85
90
95
100
123
200
700
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.