A recent study was conducted to assess two methods to estimate vehicle speed on interstate highways. A random sample of vehicles on Interstate 75 along Alligator Alley in Florida was obtained. The...

A recent study was conducted to assess two methods to estimate vehicle speed on interstate highways. A random sample of vehicles on Interstate 75 along Alligator Alley in Florida was obtained. The speed of each vehicle was measured using a loop detector and an electronic toll transponder. The data (in mph) are given in the following table.

b. Based on your conclusion in part (a), which method for estimating speed do you think the state police should use, and why?