For a table where the data has been grouped into equal class widths, the frequency density is proportional to the frequency. The frequency is often used for the height of the bars, and the graph is ...

Christina Majaski writes and edits finance, credit cards, and travel content. She has 14+ years of experience with print and digital publications. Khadija Khartit is a strategy, investment, and ...

Leslie Kramer is a writer for Institutional Investor, correspondent for CNBC, journalist for Investopedia, and managing editor for Markets Group. Robert Kelly is managing director of XTS Energy LLC, ...