Easy -1.8 This is a straightforward calculation requiring only direct application of mean and standard deviation formulas to a small dataset of 11 values. It involves basic arithmetic with no conceptual challenge, problem-solving, or interpretation—purely routine statistical computation that any S1 student should handle mechanically.
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.
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.
\hfill \mbox{\textit{CAIE S1 2011 Q1 [3]}}