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Applied Statistics in Business and Economics

Sixty-four students in an introductory college economics class were asked how many credits they had earned in college, and how certain they were about their choice of major. Use á = .01

RQ: Is the degree of certainty independent of credits earned?

Fill in the Green cells in the attached worksheet.

Credits Earned Very Uncertain Somewhat Certain Very Certain
0-9 12 8 3
10-59 8 4 10
60 or more 1 7 11

Check that the total = 64

A. Choose the Hypothesis

B. Specify the Decision Rule

C. Calculate the Test Statistic

D. Make the Decision. Are the Chi-Square assumptions met?

E. Give an interpretation of the Decision

F. P-value Method
1. Calculate the P-value, what is it?

2. Does that P-value support the Decision in Part D?

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Sixty-four students in an introductory college economics class were asked how many credits they had earned in college, and how certain they were about their choice of major. Research question:
At α = .01, is the degree of certainty independent of credits earned?
Certainty
Credits Earned Very Uncertain Somewhat Certain Very Certain Row Total
0-9 12 8 3 23
10-59 8 4 10 22
60 or more 1 7 11 19
Column Total 21 19 24 64

Answer
The null hypothesis tested is
H0: The degree of certainty independent of credits earned.
H1: The degree of certainty dependent on credits earned.
The test Statistic used is where O is the observed frequency and E is the expected frequency.
The Expected ...

Solution Summary

Chi square test from the book Applied Statistics in Business and Economics by David P Doane and Lori E. Seward

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