Figure 11 cOmpiled the individual data calculated for 1!3/’cs for all Rongelap :esidents and was referenced to June 1, 1957. The individual maximum 137s daily activity ingestion rate was approximately 4 times the population mean value. The standard deviation observed for the adult activity ingestion rate distiibution was 41% of the mean value, 39% of the mean value for young adults, 48% for adolescents, 38% for children and 54% for infants. Adolescents and infants exhibited a broader distribution than adults while children showed a fractional variation in activity ingestion rate similar to adults. Breast feeding versus coconut sap supplements would have contributed to the greater varia-‘on observed in infants. Adolescents and young adults were the population subgr «ips which have been observed to move frequently between atolls. This mo- bility would lead to greater variations in the daily activity ingestion rates reia=' ve to those observed in the more stationary population subgroups. Figure 12 also exhibited a wave pattern; however, a distinct difference between males and females was indicated. This difference arose from the use of di- etary rate constants listed in Table 3 which were derived from urine data for male and female residents at Rongelap Atoll. Its major impact was on the dose equivalent rate, not on the total dose equivalent; and its effect was to cause the dose equivalent rate for males to rise and decline more rapidly than for females. ” Figures 13a and 136 summarize the individual data for 90... for all Rongelap residents and were referenced to June 1, 1957. A bimodal shape was observed for the distributions which contained both sexes thus reflecting the difference in the 905. dietary rate constants. Data from urine bioassay indicate] that the observed difference between the male and female value for Ke was ~)t significant. A t-test was peformed between consecutive urine measure13