Histograms and Frequency Polygons

Start with the histogram flashcards

The histogram flashcard deck is a useful first stop. It asks what a histogram is, what the area and height of each bar represent, and how to work out frequency density. Use the questions to check what you can explain before opening a mind map. You can also return to the cards after studying to see which ideas need another look.

Connect the formula to the bars

The mind map titled Histograms and frequency density describes a histogram as a bar chart whose bars can have different widths. It places frequency density on the vertical axis and gives the formula: frequency density = frequency / class width.

Other mind maps titled Histograms connect frequency to the area of a bar. One also discusses using a histogram to find values, while another describes the median as the value with equal area on each side. Compare the maps with the flashcard questions to connect each formula or description to the part of the histogram it concerns.

Move on to frequency polygons

The flashcard deck Frequency polygons and ratio includes frequency polygons as well as ratio. Its frequency polygon cards describe representing grouped data and entering points at class midpoints. After studying the histogram resources, use these cards to focus on how the listed materials describe a different representation of grouped data.

Use the resources together

This topic is one section of the Statistics and Data Handling unit in Mathematics. The maps and cards offer different ways to study the material listed in this section. With a free account, you can make your own quiz and save your quiz scores; use a map to choose the ideas you want to check. Choose a resource and build a short quiz around it.