Answer Happy

The lengths of a particular animals pregnancies are approximately normally distributed, with mean p=277 days and standard deviation a 20 days. (a) What proportion of pregnancies lasts more than 302 days? (b) What proportion of pregnancies lasts between 262 and 287 days? (c) What is the probability that a randomly selected pregnancy lasts no more than 272 days? (d) A "very preterm baby is one whose gestation period is less than 247 days. Are very preterm babies unusual? Click the icon to view a table of areas under the normal curve.
The lengths of a particular animal's pregnancies are approximately normally distributed, with mean μ=277 days and standard deviation o=20 days. (a) What proportion of pregnancies lasts more than 302 days? (b) What proportion of pregnancies lasts between 262 and 287 days? (c) What is the probability that a randomly selected pregnancy lasts no more than 272 days? (d) A "very preterm baby is one whose gestation period is less than 247 days. Are very preterm Babies unusual? Click the icon to view a table of areas under the normal curve