Module 2: Summarizing Data Graphically and Numerically

Introduction to Histograms

Introduction to Histograms

What you’ll learn to do: Describe the distribution of quantitative data using a histogram.

This is a sample histogram, it has bars between -3 and 3 at 1/2 a unit interval ranging with a height of 0 to a little over 25.

When presented with large data sets, the dotplot is sometimes cumbersome to put together. In addition, it may not be the cleanest way to present the data. For large datasets, a histogram can represent the numerous data points more simply as bars instead of an immense amount of data points in a dotplot. Similar to the dotplot, a histogram is useful in displaying the distribution (aka shape) of the data.

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