Pregnancy length the length of human pregnancies from


Question: Pregnancy length The length of human pregnancies from conception to birth follows a Normal distribution with mean 266 days and standard deviation 16 days. Choose a pregnant woman at random. Let X = the length of her pregnancy.

(a) Find P(X ≥ 240) and interpret the result.

(b) What is P(X > 240)? Explain.

(c) Find the value of c such that P(X ≥ c) = 0.20. Show your work.

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Basic Statistics: Pregnancy length the length of human pregnancies from
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