Write down the median.

Find the interquartile range.

Complete the frequency table below.

median $m = 32$     A1     N1

[1 mark]

lower quartile ${Q_1} = 22$ , upper quartile ${Q_3} = 40$     (A1)(A1)

${\text{interquartile range}} = 18$     A1      N3

[3 marks]

     A1A1     N2

[2 marks]

This question was answered successfully by a majority of candidates. A common error was to use values of 20 and 60 for the lower and upper quartiles. Some were careless when reading the graph scale and wrote incorrect answers as a result.

This question was answered successfully by a majority of candidates. A common error was to use values of 20 and 60 for the lower and upper quartiles. Some were careless when reading the graph scale and wrote incorrect answers as a result.

This question was answered successfully by a majority of candidates. A common error was to use values of 20 and 60 for the lower and upper quartiles. Some were careless when reading the graph scale and wrote incorrect answers as a result.