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In: Statistics and Probability

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

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

orchestra answered 2 years ago
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