[Step-by-Step] In a recent Gallup survey, a question was asked a sample of 100 entrepreneurs about the origin of the car they personally drive most frequently.
Question: In a recent Gallup survey, a question was asked a sample of 100 entrepreneurs about the origin of the car they personally drive most frequently. The responses are summarized below.
| U.S. | Europe | Japan |
| 45 | 46 | 9 |
- Do data provide evidence of a difference in the car preference of entrepreneurs? Test using α = 0.05.
- Do data provide sufficient evidence that there is a difference in the preference of entrepreneurs for domestic versus foreign cars? Test using α = 0.05.
- What assumption must be made to ensure that the inferences in parts a and b were valid?
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