Mean Absolute Deviation

Mean Absolute Deviation

An acronym used is MAD

M = Mean

A= Absolute

D= Deviation

Multiple Choice

What does the "M" stand for in MAD?

• Mean

• Median

• Mode

• Multiply

Open Ended

Recall all the math you have learned so far. When did we use the word 'Absolute'?

We have learned about the word ABSOLUTE before

OH YEAH. ABSOLUTE VALUE!!!

What does absolute value mean again?

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M

ABSOLUTE

D

Multiple Choice

Absolute value means to find the ________ from zero.

• Mean

• Median

• Mode

• Distance

Means to find the distance from the mean!

The Absolute in MAD

Means to find the distance a number is from zero

Absolute Value

What does absolute have to do with MAD process?

Draw

Show the distance between 3 and 8

DEVIATION refers to how spread out data is.

Multiple Choice

What does Mean Absolute Deviation mean?

• The distance from zero data is

• The average of a set of numbers

• The distance data is from the mean that tells how spread out data is

• A summary of a given data set using mean, median, mode

M = Find the Mean

A = Find the distance from the mean

D = Find the mean of the distances

Let's practice

Multiple Choice

What is the Mean Absolute Deviation of the following data set? (You have to find the mean first, then the distance from the mean, then find the mean of the distances)

3, 4, 4, 6, 8

• 5

• 1.6

• 25

• 2

Multiple Choice

What is the M.A.D of the following data if the mean is 87?

70, 82, 88, 90, 96, 96

• 7.3

• 3.7

• 44

• 87

Open Ended

A company gathers the salaries of all it's employees and calculates the M.A.D. They discover the M.A.D is $50,000. What do think this says about the salaries of the employees?

Multiple Choice

True or False: Mean Absolute Deviation will always be a whole number

• True

• False