1 At a tourist information office the numbers of people seeking information each hour over the course of a 12-hour day are shown below.
$$\begin{array} { l l l l l l l l l l l l }
6 & 25 & 38 & 39 & 31 & 18 & 35 & 31 & 33 & 15 & 21 & 28
\end{array}$$
- Construct a sorted stem and leaf diagram to represent these data.
- State the type of skewness suggested by your stem and leaf diagram.
- For these data find the median, the mean and the mode. Comment on the usefulness of the mode in this case.