"For Our Study of Driving Habits, We Recorded the Speed $\mu$

Multiple Choice

"For our study of driving habits, we recorded the speed of every fifth vehicle on Drury Lane. Nearly every car traveled right at the speed limit or a little over, but there were some that were 10 mph under, even fewer at 20 mph under, and one car that crept by at just 15 mph. On the basis of the central tendency calculation on our data, we drew conclusions about all drivers on this stretch of road." The proper central tendency value calculated from the data is the

A) population median
B) sample median
C) population mean ( $\mu$ )
D) sample mean ( $\overline { \mathrm { X } }$ ) .