OCR GCSE Mathematics · J560
Specification 12.03a · Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Foundation), Paper 4 (Higher), Paper 5 (Higher), Paper 6 (Higher)
Revise: Quartiles, Box Plots and Comparing PopulationsA summary statistic condenses part of a data set into one number. An average describes a typical value, while a measure of spread describes how much the values vary. Both are needed: two groups can have the same average but very different spreads.