Abstract
Two classes of Year 8 students were asked to organize and represent sets of numerical data
with large variation of scores, to determine the extent to which the students had learned to
produce grouped data and represent them in displays such as a histogram (as stated in the
current Queensland syllabus for Year 7). Analysis of the students’ responses in terms of a
statistical-thinking framework revealed wide variation in students’ ability to re-organise the
data and represent them in organised graphs. Only 21% of students were able to complete
the task successfully. Interviews with other students indicated that a little prompting in
terms of grouping the data assisted many to produce grouped data with convenient interval
sizes. The results of the study have implications for the teaching and learning of the
organisation and representation of grouped data.
Steven Nisbet