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
Group B
4.
5
5.5
4.8
4.9
4.6
4.0
5.0
4.2
4.8
4.8
4.
4
4.1
4.
7
3.5
5.214.6
3.9 4.
3
4
Which statement is true about the distributions of completion times?
The students in Group A tended to complete the quiz in less time.
The median of Group A is greater than the median of Group B.
The means of both groups are about the same
The standard deviation of Group B is less than the standard deviation of Group