Range
Grade 3-5
The difference between the maximum and minimum values in a data set, measuring overall spread. Range is the simplest measure of spread.
Definition
The difference between the maximum and minimum values in a data set, measuring overall spread.
💡 Intuition
Range tells you how spread out your data is from end to end. If the tallest kid is 5 feet and the shortest is 4 feet, the range is 1 foot - that's the 'stretch' of heights.
🎯 Core Idea
Range measures the total span of the data from lowest to highest. A single extreme outlier can make range misleadingly large.
Example
🌟 Why It Matters
Range is the simplest measure of spread. It gives a quick sense of how much values vary.
Related Concepts
🚧 Common Stuck Point
Students sometimes report the maximum and minimum as the range instead of computing their difference — range is one number, not two.
⚠️ Common Mistakes
- Forgetting to subtract
- Confusing with number of values
- Ignoring that outliers inflate range
Frequently Asked Questions
What is Range in Statistics?
The difference between the maximum and minimum values in a data set, measuring overall spread.
Why is Range important?
Range is the simplest measure of spread. It gives a quick sense of how much values vary.
What do students usually get wrong about Range?
Students sometimes report the maximum and minimum as the range instead of computing their difference — range is one number, not two.
Next Steps
How Range Connects to Other Ideas
Once you have a solid grasp of range, you can move on to variability intro.