1 The lengths, in centimetres, of 18 snakes are given below.
$$\begin{array} { l l l l l l l l l l l l l l l l l l }
24 & 62 & 20 & 65 & 27 & 67 & 69 & 32 & 40 & 53 & 55 & 47 & 33 & 45 & 55 & 56 & 49 & 58
\end{array}$$
- Draw an ordered stem-and-leaf diagram for the data.
- Find the mean and median of the lengths of the snakes.
- It was found that one of the lengths had been measured incorrectly. After this length was corrected, the median increased by 1 cm . Give two possibilities for the incorrect length and give a corrected value in each case.