The length of maternity stay in U.S. hospitals is normally distributed, with mean of 3.5 days...

The length of maternity stay in U.S. hospitals is normally distributed, with mean of 3.5 days and a standard deviation of 1.2 days. We randomly survey 91 women who recently bore children in U.S. hospitals.

Let X= maternity stay in U.S. hospital, and X¯= average maternity stay for a sample of size 91 .

X∼ (pick one) BPEN ( , ) .

X¯∼ (pick one) EPNB ( , ) .

What is the probability that the average stay is more than 3 days?

P(X¯>3)=

Which of the following is more likely?

an individual stays more than 5 days the average stay of 91 women was more than 5 days

Solutions

Expert Solution

ans-> an individual stays more than 5 days > the average stay of 91 women was more than 5 days

orchestra answered 1 year ago

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