1 The following are the times, in minutes, taken by 11 runners to complete a 10 km run.
\(\begin{array} { l l l l l l l l l l l } 48.3 & 55.2 & 59.9 & 67.7 & 60.5 & 75.6 & 62.5 & 57.4 & 53.4 & 49.2 & 64.1 \end{array}\)
Find the mean and standard deviation of these times.