Question: =+d. A Dear Abby column dated January 20, 1973, contained a letter from a woman who stated that the duration of her pregnancy was exactly

=+d. A Dear Abby column dated January 20, 1973, contained a letter from a woman who stated that the duration of her pregnancy was exactly 310 days. (She wrote that the last visit with her husband, who was in the navy, occurred 310 days before the birth.) What is the probability that the duration of a pregnancy is at least 310 days? Does this probability make you a bit skeptical of the claim?

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