Introduction to Probability and Statistics
Introduction to Probability and Statistics
14th Edition
ISBN: 9781133103752
Author: Mendenhall, William
Publisher: Cengage Learning
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Chapter 14, Problem 14.44SE

a.

To determine

To find: Whether there is a difference in the responses to the question over time at 5% level of significance.

b.

To determine

To explain: The nature of the by checking whether there any significant differences exist.

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