This deep dive covers Understanding Range within Range & IQR for GCSE Mathematics. 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 be a useful differentiator on mixed-topic papers. It is section 3 of 8 in this topic. Use this deep dive to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 3 of 8
Practice
12 questions
Recall
20 flashcards
Understanding Range
What is Range?
Definition: Range = Highest value - Lowest value
Purpose: Shows the total spread of the data
Example: Finding Range
Test scores: 45, 62, 73, 81, 59, 68, 94, 52
Highest score = 94, Lowest score = 45
Range = 94 - 45 = 49 marks
Advantages and Disadvantages of Range
Advantages:
- Easy to calculate
- Uses all available data (highest and lowest)
- Easy to understand
Disadvantages:
- Affected by outliers
- Only uses two values, ignores the rest
- Can be misleading if outliers are present
Keep building this topic
Read this section alongside the surrounding pages in Range & IQR. That gives you the full topic sequence instead of a single isolated revision point.
Practice Questions for Range & IQR
The range of a set of data is calculated by:
Explain why the interquartile range (IQR) is sometimes preferred over the range as a measure of spread.
Quick Recall Flashcards
12 questions on Range & IQR — practise free
Instant marking, adaptive difficulty, and 20 spaced repetition flashcards. Free until your GCSEs.
Try PrepWise Free