What a histogram shows
What a histogram shows

A histogram is used for grouped numerical data, especially when class widths are different. The bars touch because the data are continuous or treated as continuous.
Step-by-step lessons on Edexcel A Level Maths 3.4 Histograms. Each one builds up to exam-style questions. Build fluency with the core pure algebra and calculus toolkit early, since almost every mechanics and statistics topic on the course depends on it.