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A vehicle quality survey asked new owners a variety of questions about their recently purchased automobile....

A 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  owners who had recently purchased an automobile.

Education
Quality Rating Some HS HS Grad Some College College Grad
Average 30 25 25 60
Outstanding 50 50 45 90
Exceptional 20 25 30 50

a. Use a  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  test statistic (to 2 decimals).

The -value is - Select your answer -between .01 and .025between .025 and .05between .05 and .10greater than .10less than .01Item 2

What is your conclusion?

- Select your answer -Cannot concludeConcludeItem 3 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 upon how new owners rate the quality of their recently purchased automobiles.

Average
Outstanding
Exceptional

New owners - Select your answer -do not appearappearItem 7 to be satisfied with the recent purchase of their automobile.   of owners rated their automobile as Outstanding or Exceptional.

Solutions

Expert Solution

b)

Quality Rating Some HS HS Grad Some College College Grad Total %
Average 30 25 25 60 140 28%
Outstanding 50 50 45 90 235 47%
Exceptional 20 25 30 50 125 25%
500

appear to be satisfied with the recent purchase of their automobile.  

% of owners rated their automobile as Outstanding or Exceptional. = 47% + 25% = 72%

milcah answered 1 year ago
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