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Mathematics

21 January, 06:22

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