Which statement correctly describes the proportion of arm spans that are longer than 170 cm?
The side-by-side stemplot below displays the arm
spans, in centimeters, for two classes.
Arm Span (cm)
Class A
Class B
8 14
31 15 3
9 6 5 15 5 6
4 2 1 16 0 2 2 2 3 3
995 16 5 6 7
10 17 03
99 65 17
320
18 | 0 1 2
66
18 9
0 19 2
19
20 2
Key: 1515 = 155 cm
O The proportion of arm spans that are longer than 170
cm is higher in Class B than in Class A.
O The proportion of arm spans that are longer than 170
cm is higher in Class A than in Class B.
O The proportion of arm spans that are longer than 170
cm is about the same for Class A and Class B.
The proportion of arm spans that are longer than 170
cm cannot be compared with the given information.