Context: First, find the arithmetic mean: $\frac{4+7+10}{3} = \frac{21}{3} = 7$. Next, calculate the absolute deviations from the mean: $\vert{}4-7\vert{}=3$, $\vert{}7-7\vert{}=0$, $\vert{}10-7\vert{}=3$. Mean of deviations:$\frac{3 + 0 + 3}{3} = \frac{6}{3} = 2$