(a(i))[1]
Use the diagram to obtain an estimate of the median.
(a(ii))[1]
Use the diagram to obtain an estimate of the lower quartile.
(a(iii))[1]
Use the diagram to obtain an estimate of the interquartile range.
(a(iv))[2]
Use the diagram to find how many houses have a floor area greater than $120\,\text{m}^2$.
(b(i))[4]
Calculate an estimate of the mean floor area.
(b(ii))[4]
Complete the histogram so that it represents the information in the frequency table.
(b(iii))[3]
Find the probability that one house has a floor area greater than $130\,\text{m}^2$ and the other has a floor area of $60\,\text{m}^2$ or less.