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From the
population of teeth we pick up two teeth “1” and “2” FROM AN SPECIFIC RED CIRCLE
and analyze how much these two teeth are alike each other. Thereafter we pick up again two new teeth “3’ “ and 4’ “ again FROM ANOTHER SPECIFIC RED CIRCLE and analyze how much these two teeth are alike each other. Since belonging to a arbitrarily defined red circle does not influences tooth health. Certainly (1=2) and (3=4) not more (1=3) or (1=4) or (2=3) or (2=4) Differences are only by random. |