The lengths of a particular animal's pregnancies are approximately normally distributed, with a mean \( \mu = 251 \) days and a standard deviation \( \sigma = 8 \) days. **(a)** What proportion of pregnancies lasts more than 255 days?The proportion of pregnancies that last more than 255 days is **0.3085**.*(Rounded to four decimal places as needed.)***(b)** What proportion of pregnancies lasts between 249 and 253 days?The proportion of pregnancies that last between 249 and 253 days is **0.1974**.*(Rounded to four decimal places as needed.)***(c)** What is the probability that a randomly selected pregnancy lasts no more than 241 days?The probability that a randomly selected pregnancy lasts no more than 241 days is **0.1056**.*(Rounded to four decimal places as needed.)***(d)** A "very preterm" baby is one whose gestation period is less than 231 days. Are very preterm babies unusual?The probability of this event is \( \boxed{\phantom{0.0000}} \), so it \( \boxed{\phantom{\text{isn't}/\text{is}}} \) be unusual because the probability is \( \boxed{\phantom{\text{less}/\text{greater}}} \) than 0.05.*(Rounded to four decimal places as needed.)*

Any event having probability less than 0.05 is consider unusual.

Answered: The lengths of a particular animal's…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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