AJ.D. Power and Associates vehicle quality survey asked new owners a variety of questions about their recently purchased automobile. One question asked fo the owner's rating of the vehicle using categorical responses of average, outstanding, and exceptional. Another question asked for the owner's education level with the categorical responses some high school, high school graduate, some college, and college graduate. Assume the sample data below are for 500 owners who had recently purchased an automobile. Quality Rating Average 30 25 Outstanding 45 50 Exceptional 25 25 a. Use a 0.05 level of significance and a test of independence to determine if a new owner's vehicle quality rating is independent of the owner's education. Compute the value of the X² test statistic (to 2 decimals). Average Outstanding Exceptional Education Some HS % % HS Grad Some College 25 50 25 Use Table 3 of Appendix B to find the p-value. The p-value is-Select your answer- What is your conclusion? Select your answer that the quality rating is not independent of the education of the owner. b. Use the overall percentage of average, outstanding, and exceptional ratings to comment on how new owners rate the quality of their recently purchased automobiles. College Grad 55 New owners-Select your answer to be satisfied with the recent purchase of their automobile. 90 55 % of owners rated their automobile as Outstanding

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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Dd.102.

 

A J.D. Power and Associates vehicle quality survey asked new owners a variety of questions about their recently purchased automobile. One question asked for
the owner's rating of the vehicle using categorical responses of average, outstanding, and exceptional. Another question asked for the owner's education level
with the categorical responses some high school, high school graduate, some college, and college graduate. Assume the sample data below are for 500 owners
who had recently purchased an automobile.
Quality Rating Some HS
Average
30
55
Outstanding
45
90
Exceptional
25
55
a. Use a 0.05 level of significance and a test of independence to determine if a new owner's vehicle quality rating is independent of the owner's education.
Compute the value of the X² test statistic (to 2 decimals).
Average
Outstanding
Exceptional
%
%
%
Education
HS Grad
25
50
25
Some College
25
Use Table 3 of Appendix B to find the p-value..
The p-value is-Select your answer -
What is your conclusion?
Select your answer that the quality rating is not independent of the education of the owner.
b. Use the overall percentage of average, outstanding, and exceptional ratings to comment on how new owners rate the quality of their recently purchased
automobiles.
50
25
College Grad
New owners-Select your answer to be satisfied with the recent purchase of their automobile.
or Exceptional.
% of owners rated their automobile as Outstanding
Transcribed Image Text:A J.D. Power and Associates vehicle quality survey asked new owners a variety of questions about their recently purchased automobile. One question asked for the owner's rating of the vehicle using categorical responses of average, outstanding, and exceptional. Another question asked for the owner's education level with the categorical responses some high school, high school graduate, some college, and college graduate. Assume the sample data below are for 500 owners who had recently purchased an automobile. Quality Rating Some HS Average 30 55 Outstanding 45 90 Exceptional 25 55 a. Use a 0.05 level of significance and a test of independence to determine if a new owner's vehicle quality rating is independent of the owner's education. Compute the value of the X² test statistic (to 2 decimals). Average Outstanding Exceptional % % % Education HS Grad 25 50 25 Some College 25 Use Table 3 of Appendix B to find the p-value.. The p-value is-Select your answer - What is your conclusion? Select your answer that the quality rating is not independent of the education of the owner. b. Use the overall percentage of average, outstanding, and exceptional ratings to comment on how new owners rate the quality of their recently purchased automobiles. 50 25 College Grad New owners-Select your answer to be satisfied with the recent purchase of their automobile. or Exceptional. % of owners rated their automobile as Outstanding
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