1 The times, \(t\) seconds, taken to swim 100 m were recorded for a group of 9 swimmers and were found to be as follows.
$$\begin{array} { l l l l l l l l l }
95 & 126 & 117 & 135 & 120 & 125 & 114 & 119 & 136
\end{array}$$
- Find the values of \(\Sigma ( t - 120 )\) and \(\Sigma ( t - 120 ) ^ { 2 }\).
- Using your values found in part (i), calculate the variance of \(t\).