Histogram

A histogram shows the shape of a single batch of numbers by slicing the range into equal intervals called bins and drawing a bar whose height is how many values fall in each bin. It answers questions like: where do most values cluster, is the spread wide or narrow, is there one peak or two, and is the shape lopsided?

It is the go-to chart for seeing a distribution — the pattern of which values are common and which are rare. One caution: the picture depends heavily on the bin width you choose. Too few bins smear the shape into a blur; too many turn it into spiky noise, so it is worth trying a couple of widths before drawing conclusions.