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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Concept explainers

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 6.5, Problem 6.74ACI

Shopping on Black Friday. Refer to the International Journal of Retail and Distribution Management (Vol. 39, 2011) survey of Black Friday shoppers, Exercise 6.160 (p. 316). One question was. “How many hours do you usually spend shopping on Black Friday?”

a. How many Black Friday shoppers should be included in a sample designed to estimate the average number of hours spent shopping on Black Friday if you want the estimate to deviate no more than .5 hour from the true mean?
b. Devise a sampling plan for collecting the data that will likely result in a representative sample.

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Chapter 6.5, Problem 6.73ACI

Chapter 6.5, Problem 6.75ACI

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Chapter 6 Solutions

Statistics for Business and Economics (13th Edition)

Ch. 6.2 - Find z/2 for each of the following: a. a . = .10...Ch. 6.2 - What is the confidence level of each of the...Ch. 6.2 - A random sample of n measurements was selected...Ch. 6.2 - A random sample of 90 observations produced a mean...Ch. 6.2 - A random sample of 70 observations from a normally...Ch. 6.2 - Use the applet Confidence Intervals for a Mean...Ch. 6.2 - Use the applet Confidence Intervals for a Mean...Ch. 6.2 - Prob. 6.6LM Ch. 6.2 - Explain the difference between an interval...Ch. 6.2 - Prob. 6.8LM

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