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Range & IQR

Revise Range & IQR in Statistics for GCSE Mathematics with 12 exam-style questions and 20 flashcards. This topic appears less often, but it can still pick up marks when it appears in mixed-topic papers.

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Measuring How Spread Out Data Is

Introduction 2

Key Facts About Measures of Spread

Key Facts 3

Understanding Range

Deep Dive 4

Understanding Quartiles and Interquartile Range

Deep Dive 5

Box Plot and Quartiles Visualization

Diagram 6

Exam Tips for Range and IQR

Exam Tips 7

Advanced Applications

Deep Dive 8

Knowledge Organiser: Range and Interquartile Range (IQR)

Summary

Sample Flashcards

What is the range?

The range is the difference between the highest value and the lowest value in a dataset. Range = Highest value - Lowest value

What are quartiles?

Quartiles are values that divide an ordered dataset into four equal parts: - Q1 (Lower quartile): 25% below - Q2 (Median): 50% below - Q3 (Upper quartile): 75% below

Exam questions for Range & IQR

The range of a set of data is calculated by:

A. Adding all the values together
B. Dividing the total by the number of values
C. Subtracting the smallest value from the largest value
D. Finding the middle value when ordered

1 markfoundation

Explain why the interquartile range (IQR) is sometimes preferred over the range as a measure of spread.

2 marksstandard

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