The data set gives the heights of the workers at a body shop in centimeters.
 {175, 163, 180, 172, 179, 178, 173, 168, 180, 176, 174, 183, 186, 184, 169}
 Which of the following is the best measure of the central tendency?
 a. mean
 b. mode
 c. range
 d. standard deviation
 e. interquartile range