Basic Business Statistics, Student Value Edition

14th Edition

ISBN: 9780134685113

Author: Mark L. Berenson, David M. Levine, David F. Stephan, Kathryn Szabat

Publisher: PEARSON

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Textbook Question

Chapter 10, Problem 58PS

The American Society for Quality (ASQ) conducted a Salary of all its members. ASQ members work in all manufacturing and service-related institutions, with a common theme of an interest in quality. Two job titles are black belt and green belt. (See Section 19.6 for a description of these titles in a Six Sigma quality improvement initiative.) Descriptive statistics concerning salaries for these two job titles are given in the following table:

Chapter 10, Problem 58PS, The American Society for Quality (ASQ) conducted a Salary of all its members. ASQ members work in

a. Using a 0.05 level of significance, is there a difference in the variability of salaries between belts and green belts?

b. Based on the results of (a), which t test defined in Section 10.1 is appropriate for

comparing mean salaries?

c. Using a 0.05 level of significance, is the mean salary of black belts greater than the mean

salary of green belts?

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Chapter 10, Problem 57PS

Chapter 10, Problem 59PS

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Chapter 10 Solutions

Basic Business Statistics, Student Value Edition

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Solution Summary: The author explains how to test whether there is a difference in variability of salaries between black and green belts.

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