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A double bar graph is used for displaying categorial data. If the data are grouped into categories, such as makes of automobiles, school subjects, or types of movies, it is called categorial data. Double bar graphs are used for comparisons between 2 groups.

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Using a snap shot of random data, students learn to read histograms.
Standard: MATH 1
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Students begin to read large histograms.
Standard: MATH 1
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Independent Practice 1
Students interpret 20 histograms.
Standard: MATH 1
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Independent Practice 2
Students interpret another 20 histograms.
Standard: MATH 1
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Homework Worksheet
Offers 12 questions for home and provides an example.
Standard: MATH 1
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Students use a series of histograms to answer 10 quiz questions.
Standard: MATH 1
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