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ElenaW [278]
2 years ago
8

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

Mathematics
2 answers:
BabaBlast [244]2 years ago
8 0

According to given text data

Average of both groups

A:-

  • 10(3)+11(4)+12(3)/10
  • 30+44+36/10
  • 66+44/10
  • 110/10
  • 11

B:-

  • 9(3)+5(10)+11(2)/10
  • 27+50+22/10
  • 49+50/10
  • 99/10
  • 9.9

Group A has bigger average

Angelina_Jolie [31]2 years ago
7 0

Answer:

Group A, because seven children have a forearm length longer than 10 inches

Step-by-step explanation:

Create the dot plots based on the given information (please see attached images).

Group A = blue dots

Group B = red dots

From inspection of the attached dot plots, we can see that Group A appears to have the longer average forearm length.  This is because 7 children have a forearm length of longer than 10 inches.

To calculate the average forearm length, sum all data values and divide by the total number of data values.

\textsf{Average of Group A}=\dfrac{ 3 \times 10 + 4 \times 11 + 3 \times 12}{10}=11

\textsf{Average of Group B}=\dfrac{ 3 \times 9 + 5\times 10+ 2\times 11}{10}=9.9

Thus proving that Group A has the longer average former length.

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