Question: Show that when samples of size 2 are randomly selected with replacement, the samples have mean absolute deviations that do not center about the value

Show that when samples of size 2 are randomly selected with replacement, the samples have mean absolute deviations that do not center about the value of the mean absolute deviation of the population. What does this indicate about a sample mean absolute deviation being used as an estimator of the mean absolute deviation of a population?

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