Elementary Statistics
12th Edition
ISBN: 9780321837936
Author: Mario F. Triola
Publisher: PEARSON
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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 Solutions
Elementary Statistics
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