Assignment:
Serum PBB levels in residenis of quarantined and non-quarantined farms, MDPH study, 1974.
|
Serum PBB (ppm)
|
Quarantined Farms
|
Non-Quarantined Farms
|
|
Adults
|
Children
|
Adults
|
Children
|
|
#
|
%
|
ff
|
%
|
#
|
%
|
ft
|
%
|
|
<0.002
|
3
|
|
0
|
|
21
|
|
0
|
|
|
0.002-0.019
|
43
|
|
8
|
|
32
|
|
29
|
|
|
0.020-0.099
|
19
|
|
10
|
|
I
|
|
1
|
|
|
0.100-0.499
|
11
|
|
3
|
|
0
|
|
0
|
|
|
0.500-2.260
|
6
|
|
7
|
|
0
|
|
0
|
|
|
Total
|
82
|
|
28
|
|
74
|
|
30
|
|
|
Median level
|
0.014
|
0.035
|
0.003
|
0.006
|
Calculate percent distributions & interpret the data comparing children to adults.