Histogram Map URL
Histograms are graphs that show information arranged together in groups. It shows the distribution probability of a certain variable. The mean of the variable is in the middle of the graph with the standard deviation displayed on both sides. In this graph, they show the average weight of people with 100 pounds being the mean. Each standard deviation is 20 pounds in each direction. Histogram maps show a bell curve of the probability of what is being measured, in this case it is weight.