Some customers spend a great deal of time doing research before choosing a particular brand of a product, particularly an expensive product. Does this result in a more satisfied customer?

To shed light on this question, a random sample of people who purchased a new car within the last two years was drawn. Each was asked to report the amount of time spent researching (reading newspaper reports and brochures, as well as looking on the Internet) in hours and his or her level of satisfaction measured in the following way:

1. Extremely dissatisfied

2. Somewhat dissatisfied

3. Neither satisfied or dissatisfied

4. Somewhat satisfied

5. Extremely satisfied

Do the data allow us to infer that those who do more research are more satisfied with their choice?