Without calculating any statistics, Gabriel knew that data Set 3 would have the lowest mean absolute deviation among the three sets. How does he know?

Mean absolute deviation measures how far the data values are from their mean, on average. Outliers in Set 1 and Set 2 tend to make those distances larger, so Set 3 would have the lowest mean absolute deviation. A lower mean or fewer data points alone does not imply a lower mean absolute deviation.

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