The lengths of a particular animal's pregnancies are approximately normally distributed, with mean μ = 277 days and standard deviation o = 8 days. (a) What proportion of pregnancies lasts more than 289 days? (b) What proportion of pregnancies lasts between 275 and 281 days? (c) What is the probability that a randomly selected pregnancy lasts no more than 267 days? (d) A "very preterm" baby is one whose gestation period is less than 257 day Are very preterm babies unusual? Click the icon to view a table of areas under the normal curve. (a) The proportion of pregnancies that last more than 289 days is (Round to four decimal places as needed.)

MATLAB: An Introduction with Applications
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The lengths of a particular animal's pregnancies are approximately normally
distributed, with mean μ = 277 days and standard deviation o = 8 days.
(a) What proportion of pregnancies lasts more than 289 days?
(b) What proportion of pregnancies lasts between 275 and 281 days?
(c) What is the probability that a randomly selected pregnancy lasts no more
than 267 days?
(d) A "very preterm" baby is one whose gestation period is less than 257 days.
Are very preterm babies unusual?
Click the icon to view a table of areas under the normal curve.
(a) The proportion of pregnancies that last more than 289 days is
(Round to four decimal places as needed.)
Transcribed Image Text:The lengths of a particular animal's pregnancies are approximately normally distributed, with mean μ = 277 days and standard deviation o = 8 days. (a) What proportion of pregnancies lasts more than 289 days? (b) What proportion of pregnancies lasts between 275 and 281 days? (c) What is the probability that a randomly selected pregnancy lasts no more than 267 days? (d) A "very preterm" baby is one whose gestation period is less than 257 days. Are very preterm babies unusual? Click the icon to view a table of areas under the normal curve. (a) The proportion of pregnancies that last more than 289 days is (Round to four decimal places as needed.)
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