Key learning points

1. The interquartile range tells us how spread out the middle 50% of the data is
2. This can be seen visually with a box plot
3. Box plots and cumulative frequency graphs can be compared
4. This comparison involves the median and interquartile range

Keywords

• Interquartile range - Interquartile range is calculated by finding Q3 − Q1. This is because it is the range from the first to the third quartile.

Common misconception