Mean absolute deviation

Variablity in graphs

Intro

Mean asbolute deviation (MAD) measures the deviation of every number in the data set from the mean.

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The bigger the MAD, the bigger the spread.

The smaller the MAD, the smaller the spread.​

Subject | Subject

Some text here about the topic of discussion

Multiple Choice

What is the first step when calculating the Mean Absolute Deviation?

• Find the distance each value is from the mean
• Find the mean of the distances
• Find the mean of the data

Multiple Choice

What is the second step when calculating the Mean Absolute Deviation?

• Find the distance each value is from the mean
• Find the mean of the distances
• Find the mean of the data

Multiple Choice

What is the third step when calculating the Mean Absolute Deviation?

• Find the distance each value is from the mean
• Find the mean of the distances
• Find the mean of the data

Multiple Choice

Find the Mean Absolute Deviation:  5, 11, 2, 7, 16.  The Mean is 8.2 

• 3.2
• 2.8
• 1.2
• 4.2

Multiple Choice

Find the Mean Absolute Deviation of the set: 10, 5, 7, 14, 19, 32, 25

• 8

• 16

• 56

• 112

The following chart represents the heights of boys on the basketball and soccer teams.

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​What inference can be made based on this information?

A Soccer players have a higher average skill level than basketball players.

B Soccer players have a lower average weight than basketball players.

C Basketball players have a higher average height than soccer players.

D No inference can be made.

Multiple Choice

Use the dot plots representing the number of siblings of students in each class.

Visually Compare the 2 Dot Plots

• All the data are 7 siblings or fewer; There is a greater spread in the number of siblings in Mr. Walker’s class.

• All the data are 7 siblings or fewer; There is a greater spread in the number of siblings in Mr. Whites’s class.

• All the data are 6 siblings or fewer; There is a greater spread in the number of siblings in Mr. Walker’s class.

• All the data are 6 siblings or fewer; There is a greater spread in the number of siblings in Mr. Whites’s class