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Bar Graphs and Histograms

This topic deals with displaying and analyzing data in bar graphs and histograms.

Topic: Make and Interpret a Bar Graph

  • The scale must include all of the data values. The interval separates the scale into equal parts

  • The scale and interval should be chosen such that all the data values can be clearly marked on the graph

  • The horizontal axis is labeled with the categories and the vertical axis is labeled with the scale (data values)

  • The height of each bar represents the frequency for that category

Topic: Make and Interpret Double Bar-Graphs

  • A double bar graph is drawn to compare two related sets of data

  • The scale must include all of the data values. The interval separates the scale into equal parts

  • The scale and interval should be chosen such that all the data values can be clearly marked on the graph

  • The horizontal axis is labeled with the categories and the vertical axis is labeled with the scale (data values)

  • The height of each bar represents the frequency for that category

Topic: Make and Interpret a Histogram

  • For the horizontal axis, intervals should be equal and they must be chosen such that they cover all the values in the table

  • The scale must include all of the data values. The interval separates the scale into equal parts

  • The scale and interval should be chosen such that all the data values can be clearly marked on the graph

  • The horizontal axis is labeled with the equal intervals and the vertical axis is labeled with the scale (data values)

  • The height of each bar represents the frequency for that interval

Topic: Compare Bar Graphs and Histograms

  • A Bar graph is a graph which is used to represent quantities using solid bars. It is generally used to compare data

  • A histogram is a special type of bar graph which is used to represent the frequency of the numerical data that have been organized in intervals
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