The two dot plots below compare the forearm lengths of two groups of schoolchildren:

Mathematics

1 answer:

jeka57 [31]2 years ago

5 0

Answer:

The correct option is B.

Step-by-step explanation:

From the given dot plot we can say that 3 children have 9 in. long forearm, 4 children have 10 in. long forearm and 3 children have 11 in. long forearm.

The average of length of forearms of Group A is

The average of length of forearms of Group A is 10 inches.

From the given dot plot we can say that 3 children have 10 in. long forearm, 5 children have 11 in. long forearm and 2 children have 12 in. long forearm.

The average of length of forearms of Group B is

The average of length of forearms of Group B is 10.9 inches.

10.9>10 it means Group B has longer average forearm length. It is true because two children have a forearm length longer than 11 inches.

Therefore the correct option is B.

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