The collecting, recording, analysing and interpreting of data is a skill that is increasingly in demand in society. Pupils will carry out data collection and analysis in a number of subjects. The are expected to be able to do the following.

# Year 7

- collect own data for a survey,
*e.g. through designing a questionnaire* - construct frequency tables for sets of data, grouped where appropriate, in equal class intervals (groups given to learners)
- construct a wide range of graphs and diagrams to represent the data and reflect the importance of scale
- interpret diagrams and graphs (including pie charts)
- use mean, median, mode and range to compare two distributions (discrete data).

# Year 8

- plan how to collect data to test hypotheses
- construct a wide range of graphs and diagrams to represent discrete and continuous data
- construct frequency tables for sets of data in equal class intervals, selecting groups as appropriate
- construct graphs to represent data including scatter diagrams to investigate correlation
- interpret diagrams and graphs to compare sets of data
- use mean, median, mode and range to compare two distributions (continuous data).

# Year 9

- test hypotheses, making decisions about how best to record and analyse the information from large data sets
- construct and interpret graphs and diagrams (including pie charts) to represent discrete or continuous data, with the learner choosing an appropriate scale
- select and justify statistics most appropriate to the problem considering extreme values (outliers)
- examine results critically, select and justify choice of statistics recognising the limitations of any assumptions and their effect on the conclusions drawn
- use appropriate mathematical instruments and methods to construct accurate drawings.

# Extension

- understand slopes and gradients of graphs and relate to compound measures.