STAT 3500 QUIZ #3T. DeWees
Name: Score:
Show ALL work for ALL problems.
1. In many ways the perception of a product has more to do with sales than the actual quality of the product.
To assess the effects of expectation on the perception of aesthetic quality, an investigator randomly sorts 21
amateur wine aficionados into three groups, A, B, and C. Each subject is scheduled for an individual interview.
The subjects who were interviewed are asked to rate wine from 1(worst) to 10(best).
As it happens, the three wines are the same for all subjects. The only difference is in the texture of the
interview, which is designed to induce a relatively high expectation of quality in the members of group A; a
relatively low expectation in the members of group C; and a merely neutral state, tending in neither the one
direction nor the other, for the members of group B.
Determine at the α= 0.01 if the perception given by the interviewer has an effect on the perceived quality of
the wine.
Group
A B C
6.4 2.5 1.3
6.8 3.7 4.1
7.2 4.9 4.9
8.3 5.4 5.2
8.4 5.9 5.5
9.1 8.1 8.2
9.4 8.2
9.7
1
