Question

Problem 90i

Answer 1

Given information

Given that, the average length of maternity stay in a U.S. hospital is said to be 2.4 days with a standard deviation of 0.9 days. We randomly survey 80 women who recently bore children in a U.S. hospital.

Then we have to check if we were, to sum up, the women’s stays, is it likely that collectively they spent more than a year in the hospital and justify our answer.

Step-by-step explanation

Step 1.

From the given information we have, 

Then the probability that collectively they spent more than a year in the hospital is given by,

Therefore the probability that collectively they spent more than a year in the hospital is approximately .