STA005 · Probability & statistics · Classes 6–10
Range
The range is the difference between the largest and smallest values: a quick measure of spread.
max − minRange
📐 Formula
range = maximum − minimum
✏️ Worked example
2, 3, 3, 5, 7, 8, 9: range = 9 − 2 = 7.
🌍 Where it is used
Temperature range in a day, price range of a product.
❓ Quick check
Range of 15, 8, 22, 10?
🏋️ Practice
EasyRange of 3, 3, 3?
Answer: 0
MediumMax 40 °C, min 26 °C. Range?
Answer: 14 °C
ChallengeWhy can the range mislead?
Answer: One extreme value changes it a lot