The following data give the distribution of heights of students :
$\begin{array}{cccccccc}\underset{\left(\text{in cm}\right)}{\mathrm{Height}}& 160& 150& 152& 161& 156& 154& 155\\ \underset{\text{students}}{\text{Numbers of }}& 12& 8& 4& 4& 3& 3& 7\end{array}$
The median of the distribution is

(i) Represent the data given above by a grouped frequency distribution table, taking the class intervals as $160-165,165-170,$ etc.
(ii) What can you conclude about their heights from the table?