Using the above ideas it might be possible then, to generate a "reasonable" dietary intake for each of the 36 females. - This scheme could be repeated day after day for as long a time period as desired (easily done on the computer). Note that we have added variability by using different dietary intakes for individuals and a range of possible daily intakes for each food item. So far we have considered only variation in dietary intake. Now we must consider the concentration of Sr-90 in each days diet. Consider a given food, say coconut. While we do not have much data on coconuts, it is reasonable to assume the distribution of concentrations in coconuts over the island would be lognormal if the soil concentrations in which those coconuts grew is lognormal. We could imagine that coconuts are gathered from different trees and hence that each days intake of coconut is a sample from a lognormal distribution. The parameters u and o (mean and standard deviation of the logarithms of the data) of that distribution can be estimated from the parameters of the soil distribution and the ratio data. Using the estimated parameters ‘ and G, the computer could generate a pCi/g concentration intake from ingesting coconut for each day. The Sr-90 daily intake for each food could be so generated. The parameters of the lognormal distribution for each food would be different if the food to soil ratios varied for each food (which they do). For each of the 36 females the following data would hence be generated (assume only 2 foods in the diet for ease of illustration), where Food 1 Day } 2 365 grams/day pCi/g° Food 2 —pCi/day Gy Gio C1 Cio G14C1y Bil yp Gi 365 1,365 91, 365°, 365 grams/day pCi/g_ pCi/day G54 Goo C5) Cop 65405) G9o9 Go 365 2,365 "2, 365¢2,365