Essentials of Statistics for Business and Economics
9th Edition
ISBN: 9780357118191
Author: David R. Anderson, Dennis J. Sweeney, Thomas A. Williams
Publisher: Cengage Learning US
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Chapter 6.3, Problem 31E
Visitors to Rocky Mountain National Park. Rocky Mountain National Park is a popular park for outdoor recreation activities in Colorado. According to U.S. National Park Service statistics, 46.7% of visitors to Rocky Mountain National Park in 2018 entered through the Beaver Meadows park entrance, 24.3% of visitors entered through the Fall River park entrance, 6.3% of visitors entered through the Grand Lake park entrance, and 22.7% of visitors had no recorded point of entry to the park (U.S. National Park Service website). Consider a random sample of 175 Rocky Mountain
National Park visitors. Use the normal approximation of the binomial distribution to answer the following questions.
- a. What is the
probability that at least 75 visitors had a recorded entry through the Beaver Meadows park entrance? - b. What is the probability that at least 70 but less than 80 visitors had a recorded entry through the Beaver Meadows park entrance?
- c. What is the probability that fewer than 10 visitors had a recorded entry through the Grand Lake park entrance?
- d. What is the probability that more than 45 visitors have no recorded point of entry?
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Chapter 6 Solutions
Essentials of Statistics for Business and Economics
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