Objectives:


Support:

  • Decide which data to collect to answer a question, and the degree of accuracy needed; identify possible sources.
  • Collect data using a suitable method, such as observation, controlled experiment, including data logging using ICT, or questionnaire.
  • Calculate statistics, including with a calculator; recognise when it is appropriate to use the range, mean, median and mode.
  • Construct, on paper and using ICT:
    • pie charts for categorical data;
    • bar charts and frequency diagrams for discrete data;
  • identify which are most useful in the context of the problem.
  • Construct and use stem-and-leaf diagrams.

Core:

  • Suggest a problem to explore using statistical methods, frame questions and raise conjectures.
  • Discuss how data relate to a problem; identify possible sources, including primary and secondary sources
  • Design a survey or experiment to capture the necessary data from one or more sources; determine the sample size and degree of accuracy needed; design, trial and if necessary refine data collection sheets;
  • construct tables for large discrete and continuous sets of raw data, choosing suitable class intervals; design and use two-way tables.
  • Find summary values that represent the raw data, and select the statistics most appropriate to the problem.
  • Select, construct and modify, on paper and using ICT, suitable graphical representation to progress an enquiry, including:
    • line graphs for time series;
    • scatter graphs to develop further understanding of correlation;
  • identify key features present in the data.

Extension:

  • Identify possible sources of bias and plan how to minimise it.
  • Find the median and quartiles for large data sets; estimate the mean, median and interquartile range of a large set of grouped data.
  • Select, construct and modify, on paper and using ICT, suitable graphical representation to progress an enquiry, including:
    • frequency polygons;
    • lines of best fit by eye, understanding what they represent.

Key Vocabulary:

  • Support: bar chart, pie chart, frequency diagram, line graph, distance-time graph, frequency, discrete, continuous.
  • Core: data: (raw data, representative, bias, census, sample, primary / secondary source, two-way table, discrete, continuous); statistics: (estimate of mean / median, cumulative frequency, distribution, stem-and leaf diagram).
  • Extension: data: (raw data, representative, bias, census, sample, primary / secondary source, data log, two-way table, discrete, continuous); statistics: (estimate of mean / median, cumulative frequency, distribution, stem-and leaf diagram); data display: (line of best fit, cumulative frequency graph, scatter graph).

Suggested Lesson Outcomes:


SUPPORT TARGET CORE

Framework:









Teaching & Learning Resources:


Data Handling Resources
Planning Resources
Questionnaires Resources
Frequency Tables Resources
Pie Charts Resources
Bar ChartsResources
Line Graphs Resources
Scatter Graph Resources
Quartiles Resources