Mean Absolute Deviation

My Definition

Key Characteristics

The following are true of mean absolute deviation:

  • It is calculated by averaging the absolute value of the differences between each data point and the mean value of the data set.

  • It is a measure describing the variability of a data set.

  • A data set has less variability when the mean absolute deviation is closer to zero.


Video Transcript (PDF)


The amounts of money raised by each homeroom selling tickets to the eighth-grade dance are shown below.

HR Amount Raised
801 $88
802 $116
803 $94
804 $108
805 $112
806 $124

Each homeroom raised an average of $107 selling tickets to the dance.

TEKS: 8(11)(B)