Question

The two dot plots below show the heights of some sixth graders and some seventh graders:

Answer 1

2.0 because if you divide 1.2 by 0.6 it equals 2.0

Answer 2

Answer: The variability in the heights of the sixth graders is 2 times the variability in the height of the seventh graders.

Step-by-step explanation:

Since we have given tha t

Mean absolute deviation for the first set of data = 1.2

Mean absolute deviation for the second set of data = 0.6

We need to find the number of times the variability in the height of the seventh grade is the variability in the heights of the sixth graders.

So, our expression becomes

$\dfrac{MAD\ of Seventh\ greade}{MAD\ of\ sixth\ grade}\\\\=\dfrac{1.2}{0.6}\\\\=2$

Hence, the variability in the heights of the sixth graders is 2 times the variability in the height of the seventh graders.