Calculating Mean and Absolute Value

True or false?: You subtract the mean from each data value to find the absolute deviation.

• True

• False

In calculating MAD, after you find the absolute deviations you must _____________.

• Do nothing because you are done.

• Subtract them from the mean.

• Find the mean of the absolute deviations.

Find the MAD of following test grades:
100   80   70   90   100

• 88

• 52

• 12

• 10.4

Mean is found by _________________________ .

• finding the sum of the data

• finding the middle

• finding the sum of the data, then dividing by the amount of numbers

• subtracting the minimum minus the maximum

The Yankees had the following wins over the last nine years;
89  103  95  97  95  85   84   87  84.
Find the mean. 

• 103

• 96

• 89

• 91

Determine the mean absolute deviation of the data. 9, 7, 11, 10, and 8

• 9

• 6

• 1.2

• 5

Jessica has five grades from assessments and quizzes. They are all weighted equally. If her grades are 50, 70, 88, 70, and 88, what is her current average grade?

• 71

• 72

• 73

• 74

Find the mean:
28, 18, 19, 18, 17

• 20

• 18

• 11

• 19

Find the MAD:
58, 38, 54, 48, 26, 36

• 43

• 20

• 10

• 12

Find the mean:

3.8, 4.2, 4.0, 4.2, 4.2

• 4.2

• 20.4

• 4.08

• 5.1