Statistics

Statistics is about collecting data, displaying it clearly, and drawing conclusions from it. In Key Stage 2 you work with bar charts, line graphs, pie charts, and tables — and learn how to calculate the mean average.

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Types of Data

Discrete data can only take specific values, usually whole numbers (you cannot have 2.7 children).

• Examples: number of pets, shoe size, goals scored.

Continuous data can take any value within a range.

• Examples: height, weight, temperature, time.

Choosing the right type of chart depends on the type of data you have.

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Frequency Tables and Tally Charts

A frequency table records how often each value occurs.

Example — Goals scored per match:

Goals	Tally	Frequency
0
1
2
3
4

Total matches: 4 + 7 + 8 + 3 + 2 = 24 Most common (modal) number of goals: 2 (highest frequency)

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Pictograms