Question: Vehicles in Use. Refer to Exercise 13.38. Here, the or "vehicle" refers to either a US. car or truck currently in use.

1. Determine the conditional distribution of age group for each type of vehicle.
2. Determine the marginal distribution of age group for vehicles.
3. Is there an association between the variables "type" and "age group" for vehicles? Explain your answer.
4. Find the percentage of vehicles under 6 years old.
5. Find the percentage of cars under 6 years old.
6. Without doing any further calculations, respond true or false to the following statement and explain your answer: "The conditional distributions of type of vehicle within age groups are not identical."
7. Determine and interpret the marginal distribution of type of vehicle and the conditional distributions of type of vehicle within age groups.

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