(a(i))[1]
Write down the interval that contains the median.
(a(ii))[4]
Calculate an estimate of the mean height.
(b(i))[1]
Calculate the probability that they have a height of $1.4\text{ m}$ or less.
(b(ii))[3]
Calculate the probability that both children are taller than $1.5\text{ m}$ but only one of them is taller than $1.8\text{ m}$.
(c(i))[2]
Complete the cumulative frequency table for the heights.
(c(ii))[3]
On the grid, draw the cumulative frequency diagram.
(d(i))[2]
Find an estimate of the interquartile range.
(d(ii))[2]
Find an estimate of the $60$th percentile.