Applied Statistics in Business and Economics
Applied Statistics in Business and Economics
5th Edition
ISBN: 9781259329050
Author: DOANE
Publisher: MCG
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Chapter 16.3, Problem 6SE

a.

To determine

Test whether there is any difference population median scores on the two exams at α=0.05.

Make an excel worksheet for calculating the Wilcoxon-signed rank test and check the calculations with MegaStat.

b.

To determine

Conduct two-tailed parametric t test for the paired two-sample means using Excel or MegaStat.

Identify whether the same decision is arrived.

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Why would we want to use a Chi Squared Test for this study? What are the best ways to describe the data graphically and numerically? An investigation of the association between drink preferences and the color of teeth is proposed. Subjects will be surveyed as to the type of drink most often consumed (coffee/tea. Juice, caramel-colored soda, water, or milk).  A clinical exam will be performed after dental cleaning to determine the color of the teeth (reddish brown, reddish yellow, gray, reddish gray).
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