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Question
A study was recently done in the United States in which car owners were asked to indicate whether their most recent car purchase was a U.S. car, a German car, or a Japanese car. The people in the survey were divided by geographic region in the United States. The following data were recorded.
| US | Japanese | German | |
| East Coast | 200 | 200 | 50 |
| Central | 250 | 100 | 20 |
| West Coast | 80 | 300 | 40 |
Given this situation, to test whether the car origin is independent of the geographical location of the buyer, the expected number of people in the sample who bought a German made car and who lived on the East Coast is just under 40 people.
Answer
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