Fundamentals of Statistics, Books a la Carte Edition Plus MyLab Statistics with Pearson eText -- Access Card Package (5th Edition)

5th Edition

ISBN: 9780134763699

Author: Michael Sullivan III

Publisher: PEARSON

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Textbook Question

Chapter 6, Problem 6RE

Emergency Room Visits The probability that a randomly selected patient who visits the emergency room (ER) will die within 1 year of the visit is 0.05.

Source: SuperFreakonomics

a. What is the probability that exactly 1 of 10 randomly selected visitors to the ER will die within 1 year? Interpret this result.
b. What is the probability that fewer than 2 of 25 randomly selected visitors to the ER will die within 1 year? Interpret this result.
c. What is the probability that at least 2 of 25 randomly selected visitors to the ER will die within 1 year? Interpret this result.
d. What is the probability that at least 8 of 10 randomly selected visitors to the ER will not die within 1 year?
e. Would it be unusual if more than 3 of 30 randomly selected visitors to the ER died within 1 year? Why?
f. In a random sample of 1000 visitors to the ER, how many visitors are expected to die within the next year? What is the standard deviation number of deaths?
g. At a particular emergency room, a researcher obtains a random sample of 800 visitors and finds that after 1 year 51 of them have died. Do you think this particular emergency room should be investigated to see if something unusual is occurring?

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Chapter 6, Problem 5RE

Chapter 6, Problem 7RE

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30. An individual who has automobile insurance from a certain company is randomly selected. Let Y be the num- ber of moving violations for which the individual was cited during the last 3 years. The pmf of Y isy | 1 2 4 8 16p(y) | .05 .10 .35 .40 .10 a.Compute E(Y).b. Suppose an individual with Y violations incurs a surcharge of $100Y^2. Calculate the expected amount of the surcharge.

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Chapter 6 Solutions

Fundamentals of Statistics, Books a la Carte Edition Plus MyLab Statistics with Pearson eText -- Access Card Package (5th Edition)

Ch. 6.1 - What is a random variable?Ch. 6.1 - What is the difference between a discrete random...Ch. 6.1 - What are the two requirements for a discrete...Ch. 6.1 - In your own words, provide an interpretation of...Ch. 6.1 - In Problems 58, determine whether the random...Ch. 6.1 - In Problems 58, determine whether the random...Ch. 6.1 - In Problems 58, determine whether the random...Ch. 6.1 - In Problems 58, determine whether the random...Ch. 6.1 - In Problems 914, determine whether the...Ch. 6.1 - In Problems 914, determine whether the...

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