(a)[4]
Draw a back-to-back stem-and-leaf diagram to show this data, with the Falcons on the left-hand side.
(b)[3]
Find the median and the interquartile range for the Falcons’ times.
(c)[3]
Let $x$ and $y$ represent the times, in minutes, of a runner from the Falcons and a runner from the Kites respectively. It is given that $\sum x = 792$, $\sum x^2 = 43\,504$, $\sum y = 783$, $\sum y^2 = 42\,223$. Determine the mean and standard deviation of the times taken by all 30 runners from the two teams.