This key facts covers Key Facts About Measures of Spread 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 2 of 7 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 2 of 7
Practice
12 questions
Recall
20 flashcards
Key Facts About Measures of Spread
- Range: Highest value - Lowest value
- Quartiles: Values that divide ordered data into four equal parts
- Q1 (Lower Quartile): 25% of data is below this value
- Q2 (Median): 50% of data is below this value
- Q3 (Upper Quartile): 75% of data is below this value
- IQR (Interquartile Range): Q3 - Q1 (middle 50% spread)