Which statement is NOT true? The side-by-side dotplot below displays the arm spans,
in centimeters, for two classes
Arm Span (cm)
Class A
Class B
8 14
31 153
9 6 5 15 5 6
4 2 1 16 0 2 2 2 3 3
9 95 16 5 6 7
10 17 0 3
9 9 6 5 17
320 18 012
66
189
0 19 2.
19
20 2
Key: 15/5 = 155 cm
O The mean arm span appears to be similar for the
two classes
O The arm spans for Class A have less variability than
the arm spans for Class B
O The arm spans for Class B have more variability
than the arm spans for Class A
O The arm spans for Class A are roughly symmetric,
while those for Class B are skewed left.
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