\begin{equation*}
\frac{3\left( 0 - 2.45 \right) ^{2} +
7\left( 1 - 2.45 \right) ^{2} +
12\left( 2 - 2.45 \right) ^{2} +
11\left( 3 - 2.45 \right) ^{2} +
3\left( 4 - 2.45 \right) ^{2} +
2\left( 5 - 2.45 \right) ^{2} +
2\left( 6 - 2.45 \right) ^{2}}
{39}
\end{equation*}
which is 2.151.