Mean Absolute Deviation, Mean Absolute Deviation terms

Steps to find the MAD

1) find the mean of the data set; 2) subtract to find the distance each value is from the mean; 3) find the mean of the distances (divide the sum of the distances by the number of values)

absolute value

distance a number is from zero on the number line - value of the number without the sign ( will always be a positive number)

data

group of facts; collection of information

mean absolute deviation

one measure of variability; the average of how much the individual scores of a data set differ from the mean of the set. - abbreviation: MAD

deviation

the DIFFERENCE between one set of values and some fixed value, usually the mean of the set.

1.25

What is the mean absolute deviation of these numbers 5,7,4,6,3,5,3,7

mean

a measure of center to describe a data set; same as average; add up the numbers and divide by how many number there are

measure of variability

a single number used to describe how much the data are spread out from the center of the data

4

What is the mean absolute deviation of the numbers $63,$59,$72,$68,$61,$67

2.4

What is the mean absolute deviation of the numbers 33,38,31,36,37

10.0

What is the mean absolute deviation of these numbers 110,108,100,90,88,80

2.5

What is the mean absolute deviation of these numbers 22,20,28,24

2.0

What is the mean absolute deviation of these numbers 51,57,52,55,53,50

2.9

What is the mean absolute deviation of these numbers 90,80,92,91,88,89

3.1

What is the mean absolute deviation of these numbers 20,21,30,17,14,18,20

3.6

What is the mean absolute deviation of these numbers 14,7,6,5,13