View more at http://www.MathAndScience.com. In this lesson, you will learn what a histogram is and how histograms are used in data analysis and in statistics. A histogram is a special kind of bar chart. The main difference is that there are no spaces between the bars in the chart and the xaxis contains a range of numbers rather than text labels. A histogram is used to represent a frequency distribution of data, where each of the bins are the same width on the xaxis. It is used in statistics to show a large amount of data in a single figure.