Histograms and Ogives — Part 1: Histograms and the mode: visual lesson, ICSE Class 10 Mathematics

Lesson

Histograms and Ogives, Part 1

A histogram shows how a grouped data set is spread, one touching bar per class.

In this lesson you will

Bars touch and the height of each bar is the frequency: the tallest bar is $40$–$50$.

Concept

The plan for part 1.

Concept

A histogram is a graph for continuous classes. Bars stand on the class boundaries, they touch, and the height is the frequency.

A histogram is for continuous classes, so its bars touch.
	Bar graph	Histogram
Data	separate categories	continuous classes
Bars	gaps between bars	bars touch
Horizontal axis	names of categories	class boundaries on a number line
Height	the value of the category	the frequency of the class