Author Question: The lengths of human pregnancies are normally distributed with a mean of 268 days and a standard ... (Read 44 times)

neverstopbelieb · **on:** Aug 2, 2018

The lengths of human pregnancies are normally distributed with a mean of 268 days and a standard deviation of 15 days. What is the probability that a randomly selected pregnancy lasts at least 300 days?

A) 0.9834 B) 0.0166 C) 0.0179 D) 0.4834

Question 2

If robs falls into a rejection region, then the decision is to H0 and H1.

a. accept; reject
b. reject; accept
c. fail to reject; not accept
d. reject; not accept