The mean absolute deviation of the data in the bar chart is 1.5.
How to calculate the mean absolute deviation?
The mean absolute deviation of the data in the bar chart is calculated by applying the following formula.
MAD = ∑ | x - mean| / n
The mean is calculated as follows;
mean = (4 + 5 + 6 + 1) / 4
mean = 16/4
mean = 4
The sum of the absolute mean deviation is calculated as;
∑ | x - mean| = |4 - 4| + |5 - 4| + |6 - 4| + |1 - 4|
∑ | x - mean| = 0 + 1 + 2 + 3
∑ | x - mean| = 6
MAD = ∑ | x - mean| / n
MAD = 6 / 4
MAD = 1.5