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Last month, the seventh grade and eighth grade math classes at Moore Middle School collected canned goods for the local food shelter. The dot plots below show the number of canned goods collected by the classes.


The mean absolute deviation for each grade level is 1.6. The difference between the mean number of canned goods collected by each grade level is how many times the mean absolute deviation?
A. 5
B. 4
C. 3
D. 6

Last month the seventh grade and eighth grade math classes at Moore Middle School collected canned goods for the local food shelter The dot plots below show the class=

Respuesta :

To answer this question you will need to find the mean of each class and then subtract them. You will then compare this difference to the MAD of 1.6.

Mean of 7th grade class is:
420/20=21

Mean of 8th grade class:
325/25=13

21-13=8

To find how many times , divide 8 by 1.6.

8/1.6= 5 times

The difference of the means is 5 times the MAD (mean absolute deviation).

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