It’s c-b hope that helped
Answer:
Step-by-step explanation:
Given that the mean incubation time for a type of fertilized egg kept at a certain temperature is 25 days.
Let X be the incubation time for a type of fertilized egg kept at a certain temperature is 25 days.
X is N(25, 1)
a) Normal curve is in the attached file
b) the probability that a randomly selected fertilized egg hatches in less than 23 days
=![P(X](https://tex.z-dn.net/?f=P%28X%3C23%29)
we convert x into Z score and use std normal distn table to find probability
![P(X](https://tex.z-dn.net/?f=P%28X%3C23%29%5C%5C%3D%20P%28Z%3C%5Cfrac%7B23-25%7D%7B1%7D%20%29%5C%5C%3DP%28Z%3C-2%29%5C%5C%3D%200.025)
i.e. we can say only 2.5% proportion will hatch in less than 23 days.