Question

a woman wrote to Dear Abby, saying that she had been pregnant for 310 days before giving birth.Completed pregnancies are normally distributed with a mean of 266 days and standard deviation of 16 days.use table b-7 to determine the probability that a completed pregnancy lasts at least 310 days.

Answer 1

Dear visitor
Unfortunately, the statement of your question is a bit confusing.
Table mentioned in the statement is missing. Please, give us the details so we could help you