Number of blue colonies in 1 mL household 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
23
24
25
26
27
28
29
30
31
32
34
35
36
37
38
40
41
42
43
44
45
46
47
48
50
53
56
60
64
75
78
80
90
96
98
100
111
120
160
200
300
500
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.