The police reported that the average driver exceeds the 55 miles per hour speed limit by more than 10 miles per hour on the busiest street in a small town. They know that the standard deviation of everybody's speed is 5.13. A sample of 73 randomly selected cars were clocked by airplane radar. The average speed was 68.6 miles per hour. Determine if the average speed is greater than what the police department reported.

1. Which parameter(s) are you given? Mark all that apply.
   • p
   • $\displaystyle \mu$
   • $\displaystyle \sigma$
   • none
2. Which statistic(s) are you given? Mark all that apply.
   • $\displaystyle \overline{{x}}$
   • $\displaystyle \hat{{p}}$
   • $\displaystyle \hat{{q}}$
   • s
   • none
3. What is the problem asking you to do?
   • Estimate a parameter
   • Test a given parameter
4. Which function in your calculator should you use to solve the problem?
   • 1-PropZInt
   • 1-PropZTest
   • ZInterval
   • Z-Test
   • TInterval
   • T-Test
   • invNorm