Statistics for Business and Economics (13th Edition)

13th Edition

ISBN: 9780134506593

Author: James T. McClave, P. George Benson, Terry Sincich

Publisher: PEARSON

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2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.

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Textbook Question

Chapter 4.3, Problem 4.49ACB

Hotel guest satisfaction. Each year, J. D. Power and Associates publishes the results of its North American Hotel Guest Satisfaction Index Study. For 2015, the study revealed that 15% of hotel guests were “delighted” with their experience (giving a rating of 10 out of 10). Among these guests, 80% stated they would “definitely” recommend the hotel. In a random sample of 15 hotel guests, consider the number (x) of guests who were delighted with their stay and would recommend the hotel.

a. Explain why x is (approximately) a binomial random variable.
b. Use the rules of probability to determine the value of p for this binomial experiment.
c. Assume p = .10. Find the probability that at least 10 of the 15 hotel guests were delighted with their stay and would recommend the hotel.

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Chapter 4.3, Problem 4.48ACB

Chapter 4.3, Problem 4.50ACB

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Chapter 4 Solutions

Statistics for Business and Economics (13th Edition)

Ch. 4.1 - Types of random variables. Which of the following...Ch. 4.1 - Types of finance random variables. Security...Ch. 4.1 - NHTSA crash tests. Refer to the National Highway...Ch. 4.1 - Customers in line at a Subway shop. The number of...Ch. 4.1 - Executive pay. Refer to Glassdoor Economic...Ch. 4.1 - Banking. Give an example of a discrete random...Ch. 4.1 - Economics. Give an example of a continuous random...Ch. 4.1 - Hotel management. Give an example of a discrete...Ch. 4.1 - Retailing. Give two examples of discrete random...Ch. 4.1 - Stock market. Give an example of a continuous...

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Solution Summary: The author explains that X is a binomial random variable based on the 2015 North American Hotel Guest Satisfaction Index Study.

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