A histogram is a graph that you can use to assess the shape and spread of continuous sample data. You might create a histogram before or during an analysis to help confirm assumptions and guide additional analyses.
To draw a histogram, Minitab divides sample values into intervals called bins. By default, each bar on the histogram represents the number of observations falling within a bin (the frequency). Minitab automatically determines an optimal number of bins, but you can edit the number of bins in addition to the intervals covered by each.