\[\boxed{\mathbf{308.}}\]
\[Среднее\ значение:\]
\[\frac{1 + 2 + 2 + 0 + 4 + 3}{6} = \frac{12}{6} = 2.\]
\[Отклонения:\]
\[1 - 2 = - 1\]
\[2 - 2 = 0\]
\[0 - 2 = - 2\]
\[4 - 2 = 2\]
\[3 - 2 = 1\]