A highway engineer wishes to compare the convenience and safety of two interstate highways in a large city. Two variables to consider are the time it takes to get to a destination and the number of accidents on the roads.

1. Define the populations.

2. What type of samples can be used?

3. Are the samples independent or dependent?

4. State the hypotheses for each:
a. The time it takes to get from point A to point B.
b. The proportions of accidents on the highways.

5. What significance level would you use?