Two groups of students were asked how far they lived from their school. The table below shows the distances in miles: Group A (distance in miles)1 1.5220.127.116.11.82.50.76 Group B (distance in miles)18.104.22.168.82.431.51.8 Which statement best compares the mean distances for the two groups? A. It is equal for Group A and Group B. B. It is greater for Group B than Group A. C. Its value for group A is double the value for Group B. D. Its value for group B is three times the value for Group A.
The best answer is C because 2.17 x 2=4.34 C. Its value for group A is double the value for Group B.