Question
The lengths of a particular animal's pregnancies are approximately normally distributed, with mean μ=262 days and...
The lengths of a particular animal's pregnancies are approximately normally distributed, with mean μ=262 days and standard deviation σ=16 days.
(a) What proportion of pregnancies lasts more than 282 days?
(b) What proportion of pregnancies lasts between234 and 266 days?
(c) What is the probability that a randomly selected pregnancy lasts no more than 246 days?
(d) A "very preterm" baby is one whose gestation period is less than 238 days. Are very preterm babies unusual?
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