Let a population consist of the values 7 cigarettes, 21 cigarettes, and 22 cigarettes smoked in a day. 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?   Calculate the mean absolute deviation for each possible sample of size 2 from the population. Sample Mean Absolute Deviation   ​{7,7​} __   ​{7,21​} __   ​{7,22​} __   ​{21,7​} __   ​{21,21​} __   ​{21,22​} __   ​{22,7​} __   ​{22,21​} __   ​{22 ,22​}

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