810
TURNER
°
NUMBER OF CASES
200
0
120
240
!
360
r
480
q
0
200 -
_
100
aoe
0
0
t
25
|
50
NC
75
=
100
T
200
|
300
of
q
4
4
|
12
I
24
NC
36
col
48
Fig. 4—-Four synthetic distributions of 1000 cases based on measure-
ments of '!I in vegetation samples.
distributions of radionuclides in consumers is pertinent to this problem. Of particular interest is the shape of such distributions. If these
distributions are skewed to the high side, or lognormal, then both
Statistical analyses and predictions based on such data need to be
developed with this fact in mind.
In 1956 Turekian and Kulp’? discussed the frequency distribution
of stable strontium in human bone. They concluded that the strontium/
calcium ratio approximated a normal distribution, even though there
was evident skewing to the high side. Andersonet al.”! have indicated
that “K and '"Cs in human populations are normally distributed. Both
of the histograms appear symmetrical, although the distribution of