Section 7.2 Homework Question 10

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Section 7.2 Homework Question 10

Question

Section 7.2 Homework 

10. 

The lengths of a particular​ animal’s pregnancies are approximately normally​ distributed, with mean

days and standard deviation

days.

​(a) What proportion of pregnancies lasts more than

​days?

​(b) What proportion of pregnancies lasts between

and

​days?

​(c) What is the probability that a randomly selected pregnancy lasts no more than

​days?

​(d) A​ “very preterm” baby is one whose gestation period is less than

days. Are very preterm babies​ unusual?

 

 

​(a) The proportion of pregnancies that last more than 258 days is

​(b) The proportion of pregnancies that last between 246 and 255 days is

​(c) The probability that a randomly selected pregnancy lasts no more than 237 days is

​(d) A​ “very preterm” baby is one whose gestation period is less than 222 days. Are very preterm babies​ unusual? The probability of this event is

 

 

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This question is taken from Math 136 – Introduction to Statistics » Summer 2021 » Section 7.2 Homework