Martin and Clara decide to keep track of the number of different colors in two brands of tennis shoes, brand A and brand B. Their results are

represented by the dot plots.

Brand A

0

1

2

3

4

5

6

7

8

9

10

11

12

BrandB

0

1

2

3

4

5

6

7

8

9

10

11

The mean absolute deviation for brand Als

The mean absolute deviation for brand B is

The mean absolute deviations for the two brands

Step-by-step explanation:

Answer:

A. 3.20

B. 2.54

Step-by-step explanation:

A.

Mean = 0+1+2+3+4+5+6+7+8+9+10+11+12/13

= 6

Imean - xl = 0-6, 1-6, 2-6, 3-6, 4-6, 5-6, 6-6, 7-6, 8-6, 9-6, 10 - 6, 11-6, 12-6.

= 6, 5,4,3,2,1,0,1,2,3,4,5,6

Absolute mean deviation = 42/13

= 3.20

B.

Mean = 0+1+2+3+4+5+6+7+8+9+10+11/12

= 5.5

Imean - xl = 0 - 5.5, 1-5.5, 2-5.5, 3-5.5, 4-5.5, 5-5.5, 6-5.5, 7-5.5, 8-5.5, 9-5.5, 10 - 5.5, 11-5.5, 12-5.5.

= 5.5, 4.5, 3.5,2.5,1.5,0.5,0.5,1.5,2.5,3.5,4.5

Absolute mean deviation = 2.54