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Bar Charts and the Types of Data (Mathematics Lesson)

Bar Charts and the Types of Data

Bar charts can present the different types of data.

  • Bar charts can present qualitative data (which is described in words).

    The bar chart shown below shows the number of shapes:

    bar chart for qualitative data
  • Bar charts can present quantative data (which is described in numbers).

    Quantitive data can be discrete or continuous:

    • Discrete data can only take certain values

      The bar chart shown below shows the test scores (out of 10) of a class of students. The test scores can only be whole numbers, so they are discrete:

      bar chart for discrete quantitative data
    • Continuous data can take any value (within a range).

      The bar chart shown below shows the heights of a group of friends. Heights can take any value within a range, so they are continuous:

      bar chart for continuous quantitative data

      Note: There are no gaps between the bars because continous data has no gaps in it.

      Also note: A histogram is a type of bar chart for continuous data.

Read more about types of data
Read more about qualitative data
Read more about quantitative data
Read more about discrete data
Read more about continuous data

More About Bar Charts and the Types of Data

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Note

What Is a Bar Chart?

A bar chart (or bar graph) is a chart which uses bars to present data.

The height of each bar shows how often (the frequency) each value appears in the data.

What Is Data?

Data is a set of facts (such as numbers, measurements or words) that have been collected or measured.

Data can be reported, visualized and analyzed to help us learn and make decisions.