Homework Soursecompany wants to determine wherter product ratings have chan
company wants to determine wherter product ratings have changed over the last year .
table shows ratings for 8 customers a=.05 is there enough evidence to conclude the ratings have not changed. Rejection region = to
calculate d bar = s sub d = use t test to find standard test statistic t= Reject ho or fail to reject? explain decision based on orginial claim
| Consumer | Rating (last year) | Rating (this year) |
| 1 | 6 | 7 |
| 2 | 7 | 6 |
| 3 | 6 | 6 |
| 4 | 5 | 3 |
| 5 | 9 | 6 |
| 6 | 6 | 4 |
| 7 | 7 | 6 |
| 8 | 8 | 5 |
Solution
