The sample mean absolute deviation is defined analogously as the average of the absolute deviations of the sample observations from their mean.

Find the mean absolute deviation of the annual salaries of the shop-floor supervisory staff in Table 2.1.

The mean salary for these staff members is fL = $33,500

The calculations for the mean absolute deviation are set out in the table.

.t, |
x¡- ¡1 = :t, - 33,500 |
I* ~ P1 |

34,500 |
1,000 |
1,000 |

30,700 |
-2,800 |
2,800 |

32,900 |

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