Good Evening May You please help me with this question.
Samantha decided to calculate the mean absolute deviation of the speed of the cars driving by on a busy highway. She watched the sign showing speed as the cars drove by. The next six cars registered these speeds: {65,72,76,68,79}. Help Samantha calculate.

a.4.8 b. 5.3 c. 4.6 d. 4.4