12th Edition

ISBN: 9780321836960

Author: Mario F. Triola

Publisher: PEARSON

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Binomial Distribution

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Textbook Question

Chapter 5.5, Problem 9BSC

In Exercises 9–16, use the Poisson distribution to find the indicated probabilities.

9. Earthquakes in the United States Various sources provide different earthquake data, but assume that for a recent 41-year period in the United States, there were 268 earthquakes measured at 6.0 or higher on the Richter scale (based on U.S. Geological Survey data).

a. Find the mean number of earthquakes per year.
b. Find the probability that in a given year, there is at least one earthquake in the United States that measures 6.0 or higher on the Richter scale.
c. Is it unlikely to have a year without any earthquakes that measure 6.0 or higher on the Richter scale? Why or why not?

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Chapter 5.5, Problem 8BSC

Chapter 5.5, Problem 10BSC

Chapter 5 Solutions

Elementary Statistics

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Solution Summary: The author calculates the mean number of earthquakes per year, which is 6.5, and the probability of at least one earthquake in a given year is 0.999.

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