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