# Histogram

## Definition of Histogram

A histogram is a graphical representation of the distribution of data. It is created by dividing the range of data into a series of equal intervals, and then counting the number of data points that fall into each interval.

## What is a Histogram used for?

A histogram is a graphical representation of data that uses rectangles to represent the frequency of occurrences of different values in a dataset. It is typically used to graphically display the distribution of numerical data, and can also be used to identify potential outliers in the data. A histogram consists of vertical bars representing intervals or categories, with heights or lengths proportional to the frequency of occurrence within each interval. For example, if you have data points representing individuals’ heights, you could group them into intervals such as 70”-74”, 75”-79”, etc., and then plot a bar for each interval showing how many people have heights within that range.

Histograms are useful for understanding the distributional characteristics of a dataset; for example, whether it is skewed (unevenly distributed) or symmetrical (evenly distributed). They can also be used to identify clusters or groups within a dataset, as well as any outliers (data points far from other points). Histograms are frequently used in statistical analysis and machine learning applications because they provide an easy way to visualize and interpret large amounts of data quickly.