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Statistics Revision

Data, averages & probability — part of Maths on KODO.

AQA Edexcel OCR WJEC SQA

Statistics is a core area of KS3 Maths in the national curriculum. It covers essential concepts that build the foundation for GCSE study and beyond.

This topic includes subtopics such as Mean, Median, Mode, Range and more. Each area is tested with multiple-choice questions that include detailed explanations to deepen your understanding.

Quick Reference

Mean of 2, 4, 6, 85 (sum 20 ÷ 4)
Median of 3, 5, 7, 9, 117 (middle value)
Probability of a coin landing heads1/2 or 0.5
Range of 4, 7, 2, 97 (9 − 2)

Key Definitions

Mean
Add all values and divide by how many there are.
Median
The middle value when data is arranged in order.
Mode
The value that appears most often.
Range
The difference between the largest and smallest values.
Probability
A measure of how likely an event is to happen, from 0 (impossible) to 1 (certain).

What You'll Cover

Mean
Median
Mode
Range
Probability (single event)
Bar charts interpretation
Probability
Pie charts and bar charts
Scatter graphs

Test Yourself — Statistics

Try 3 quick questions. No account needed.

Quick Quiz

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Memory Tricks & Mnemonics

"Mean is mean because you have to do the most work" (add everything, then divide)

Distinguish mean from median and mode.

"Median = Middle, Mode = Most"

The first letters match to help you remember which is which.

Probability = favourable outcomes ÷ total outcomes

The formula for theoretical probability of equally likely events.

Frequently Asked Questions

What is Mean in Maths?+
Add all values and divide by how many there are.
What is Median in Maths?+
The middle value when data is arranged in order.
What is Mode in Maths?+
The value that appears most often.
What is Range in Maths?+
The difference between the largest and smallest values.
What does Statistics cover in KS3 Maths?+
Statistics in KS3 Maths covers Mean, Median, Mode, Range, Probability (single event), Bar charts interpretation, Probability, Pie charts and bar charts. Data, averages & probability.
What is the best way to revise Statistics?+
Test yourself rather than re-reading notes. Do a short Statistics quiz, read the explanation for every answer you get wrong, then come back to those questions a few days later. KODO does this automatically with spaced repetition, and you can turn any topic into printable flash cards.
Is Statistics revision on KODO free?+
Yes. KODO is free for everyone until Friday 18 December 2026, with unlimited quizzes on Statistics and every other topic. After that there is still a free plan with daily quizzes.

Start practising Statistics now

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