Twelve homemakers were asked to estimate the retail selling price of two models of refrigerators. Their estimates of selling price are shown in table 11.

Use these data and test at the .05 level of significance to determine whether there is a difference between the two models in terms of home-makers' perceptions of selling price. In your answer formulate the hypothesis and justify choice of the type of the test.

Table 11

Estimates of the Retail Price of Two Models of Refrigerators (in USD)

Homemaker	Model 1	Model 2
1	850	1100
2	960	920
3	940	890
4	900	1050
5	790	1120
6	820	1000
7	900	1090
8	890	1120
9	1100	1200
10	700	890
11	810	900
12	920	900