Group continuous data and stack each group into a bar whose area is that group's relative frequency, with the total area equal to 1
Module goal. Learn to pick the right chart for the data type, read it correctly, and stay alert to misleading graphics, making messy data visible at a glance
eastmath.com · 34.2 Picturing the Data: Charts and Graphs · 34.2.3 Frequency Distribution Histograms