Homework Answers
The correct option is "C".
Explanation--
Chronometric dates are just close approximations of the true age of a fossil or geological deposit. This is due to the finite limits of the dating techniques and the materials being dated. Most chronometric dates are given with a plus or minus factor. For instance, 340 B.P ± 40. This usually means that there is a 2/3 probability that the actual date of the event was within the range of 300-380 B.P. The 2/3 probability is what statisticians refer to as one "standard deviation".
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