1. In an investigation to determine which of two (2) cars is perceived as the most comfortable, 25 people traveled (separately) in the back seat of a European vehicle and also in the back seat of an American car. Each person was asked to rate the trip on the following scale: 1 = very uncomfortable, 2 = quite uncomfortable, 3 = neither uncomfortable nor comfortable, 4 = quite comfortable, 5 = very comfortable. Record, for each, the number of days until the first sign of corrosion is observed. (xm21-03)

a. Is there a significant difference between people's perceptions of both vehicles?

European	American
4	5
2	1
5	4
3	2
2	1
5	3
1	3
4	2
4	2
2	2
3	2
4	3
2	1
3	4
2	1
4	3
2	1
4	3
5	4
3	1
4	2
3	3
3	4
5	2
2	3