An expert witness for a paternity lawsuit testifies that the length of a pregnancy is normally distributed with a mean of 280 days and a standard deviation of 13 days. An alleged father was out of the country from 242 to 303 days before the birth of the child, so the pregnancy would have been less than 242 days or more than 303 days long if he was the father. The birth was uncomplicated, and the child needed no medical intervention. What is the probability that he was NOT the father?
1. Calculate the z-scores first, and then use those to calculate the probability. (Round your answer to four decimal places.)
2. What is the probability that he could be the father? (Round your answer to four decimal places.)
SAT
Views: 0 Asked: 07-15 04:53:22
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