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 15 3 965 15 5 6 421 16 0 222 3 3 16 5 6 7 10 17 0 3 9965 17 320 18 0 1 2 6 6 18 9 0 19 2 19 20 2 995 Key: 15|5 = 155 cm Which statement is NOT true? 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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