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Figure 16
Figure 19,
ing loss), and conversely the values showing
fur the population. By combining scores from
most aging were chosen as 100°. The data
were examined on an individiual basis as well
individuals in
each 5-year age group, it was
believed that possible errors due to uncertainty
as on a population basis. A mean age score was
obtained for each individual by averaging all
the determinations in percentage for that indi-
of exact ages in someindividuals were reduced
various criteria, mean points for 5-vear age
2 through 20. Individual readings are plotted
vidual. In studying population trends for the
groups (in most cases) of combined exposed
and unexposed populations were plotted and a
best fit by eve curve drawn to showthe trend
of the data for the particular criterion. In the
same wav the average age scores were plotred
Siz bee
RESULTS
Theresults are plotted graphically in figures
(open circles, exposed people; closed circles. unexposed people} to showthe spread of the data
and the mean values for each 5-vear age group
(squares}. The trend of the various criteria
with increasing age is represented by a best fit