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# Exercise 8.58 stated that a random sample of 500 measurements on the length of stay in ISBN: 9780495110811 47

## Solution for problem 10.34 Chapter 10

Mathematical Statistics with Applications | 7th Edition

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Problem 10.34

Exercise 8.58 stated that a random sample of 500 measurements on the length of stay in hospitals had sample mean 5.4 days and sample standard deviation 3.1 days. A federal regulatory agency hypothesizes that the average length of stay is in excess of 5 days. Do the data support this hypothesis? Use = .05.

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Conditional Probability: probability of an event, given that another event has occurred P(A| B) is the probability of A, given that B has occurred P(A| B) is not the same as P(B|A) If events are independent then P(A)=P(A|B) and P(B)=P(B|A) A contingency table (two way table) is a visual representation of the relationships between the variable. They make probabilities easier to figure out. Levels...

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##### ISBN: 9780495110811

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