A histogram groups the numbers in a data set into ranges.
The data used in a histogram is continuous data. Continuous data is measured whereas discrete
data, which is used in bar charts, is counted.
A histogram can show the pattern of P1 incidents logged over a four-week period after a product
release. What you might see is that for the first week after the product was released, P1
incidents were low because users did not really understand the product enough to use it. In the
second week, more users started working with the product and P1 issues increased. In the third
week, P1 issues increased even more as more users began working with the product. In the fourth
week, P1 issues stayed the same as the third week. Using the information in the chart, you may
determine that it is not necessary to increase support staff until the third week after a product