Ms. Barnsley separates her class into two groups. She gives each student the same 25-question math quiz. Group A uses a calculator, while Group B does not. The table shows the completion times, in minutes, of students in each group. Quiz Completion Times (minutes) Group A 4 point 5 4 point 6 5 point 0 4 point 8 4 point 4 4 point 7 5 point 2 4 point 6 4 point 8 4 point 9 Group B 5 point 5 4 point 0 4 point 2 4 point 8 4 point 1 3 point 5 3 point 9 4 point 3 4 point 4 4 point 1 Which statement is true about the distributions of completion times?
Answer
A
The standard deviation of Group B is less than the standard deviation of Group A.
B
The means of both groups are about the same.
C
The students in Group A tended to complete the quiz in less time.
D
The median of Group A is greater than the median of Group B.