Exercise 12.12 Algo (Test of Independence)
Hint(s) Check My Work (1 remaining)
500 owners who had recently purchased an automobile.
able[[,Education,],[Quality Rating,Some HS,HS Grad,Some College,College Grad],[Average,35,30,25,60],[Outstanding,45,40,45,95],[Exceptional,20,30,30,45]]
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 χ² test statistic (to 2 decimals).
Use Table 3 of Appendix B to find the p-value.
The p-value is
What is your conclusion?
| 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.
able[[Average,%,
Outstanding,%,
Exceptional,%]]
