The sample variance is so that the sample standard deviation is sn = √439.06 = 20.95, which is a difference of 20.19 from the value we found in Quick exercise 16.3. The median is 4.6, so that the...

The sample variance is

so that the sample standard deviation is sn = √439.06 = 20.95, which is a difference of 20.19 from the value we found in Quick exercise 16.3. The median is 4.6, so that the absolute deviations from the median are given by

0.0  25.4  1.4   0.4   45.4.

The MAD is the median of these numbers, which is 1.4. Just as the median, the MAD is hardly affected by the two outliers