Average is another word for mean. Therefore, the average diameter of trees in this forest is the same as the mean: 1.93 ft. The mean absolute deviation of the other section of forest, without any other information, can only tell you how variable the diameters of the trees are. The MAD is the average distance between each data value and the mean In this case, the MAD of the other section is greater than that if the first section, therefore, the diameters of trees of the second forest section are more variable.
