\[\boxed{\mathbf{1225}\mathbf{.}}\]
\[1)\ \overline{X} =\]
\[= \frac{1 \bullet 2 + 2 \bullet 1 + 4 \bullet 3 + 5 \bullet 2}{2 + 1 + 3 + 2} =\]
\[= \frac{2 + 2 + 12 + 10}{8} = \frac{26}{8} = 3,25;\]
\[= \frac{10,12 + 1,56 + 1,68 + 6,12}{8} =\]
\[= \frac{19,48}{8} \approx 2,44.\]
\[= \frac{12,5 + 0,75 + 0,5 + 4,5 + 6,25}{10} =\]
\[= \frac{24,5}{10} = 2,45.\]
\[3)\ \overline{Z} =\]
\[= \frac{- 5 \bullet 1 - 4 \bullet 3 - 2 \bullet 3 + 3 \bullet 1}{1 + 3 + 3 + 1} =\]
\[= \frac{- 5 - 12 - 6 + 3}{8} = - \frac{20}{8} =\]
\[= - 2,5;\]
\[= \frac{6,25 + 6,75 + 0,75 + 30,25}{8} =\]
\[= \frac{44}{8} = 5,5.\]
\[Ответ:\ \ наименьший\ разброс\ \]
\[имеет\ совокупность\ \]
\[значений\ \text{X.}\]