Unit 5: Data Handling
Level 1 & Level 2
Level 3 (≈ Grade G/F)
Level 4 (Grade E)
Sort and classify objects using more than
one criteria.
Level 5 (≈ Grade D)
Given a problem that can be addressed
by statistical methods, suggest related
questions to explore and decide what
data to collect.
Construct and interpret bar charts.
Gather and record information in simple
lists, tables and block graphs to
communicate findings.
Construct and interpret pictograms.
Discuss and explain results.
Construct and interpret simple line
graphs.
Extract and interpret information given in
simple tables and lists.
Interpret graphs and diagrams including
pie charts and draw conclusions.
Collect discrete data and record using a
frequency table.
Group data in equal class intervals and
represent data in a frequency diagram.
Interpret frequency diagrams.
Understand and use the mode and range
to describe sets of data.
Understand and use the mean and
median of discrete data.
Compare two simple distributions using
the range and one of the mode, median
and mean.
Unit 5: Data Handling
Level 5 (≈ Grade D)
Given a problem that can be addressed by
statistical methods, suggest related questions
to explore and decide what data to collect.
Level 6 (≈ Grade C)
Level 7 (≈ Grade B)
Specify hypotheses and test them by
designing and using appropriate methods
that take account of variability and bias.
Level 8 and E.P. (≈ Grade A/A*)
Design a survey and data collection sheets to
collect data. Determine appropriate sample
size and degree of accuracy needed.
Interpret graphs and diagrams including pie
charts and draw conclusions.
Collect and record discrete and continuous
data choosing appropriate equal class
intervals over a sensible range to create
frequency tables.
Interpret and construct cumulative
frequency tables and diagrams using the
upper boundary of the class interval.
Construct and interpret pie charts and other
frequency diagrams.
Construct and interpret histograms.
Construct and interpret composite bar-charts.
Construct scatter diagrams and draw
conclusions from them showing a basic
understanding of correlation.
Draw a line of best fit of a scatter diagram
by inspection.
Express general laws in symbolic form when
finding formulae that approximately connect
data.
Determine the modal class, median class
and estimate the mean and range of sets
of grouped data, selecting the statistic
most appropriate to their line of enquiry.
Estimate the median and IQR and use these
to compare distributions and make
inferences.
Construct on paper and using ICT a range of
graphs and charts, identifying which are most
useful in the context of a problem.
Understand and use the mean and median of
discrete data.
Compare two simple distributions using the
range and one of the mode, median and
mean.
Calculate the mean and mode from a
frequency table.
Use measures of average and range with
associated frequency polygons to compare
distributions and make inferences.