NOT Instagrams.  Histograms are all about groups of numerical data.  Histograms show intervals of data.  For example, a histogram may show how many.

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Presentation transcript:

NOT Instagrams

 Histograms are all about groups of numerical data.  Histograms show intervals of data.  For example, a histogram may show how many people at a Justin Bieber concert were in their teens, twenties, thirties, forties, and fifties.

 Example  The boys in Mr. Robinson’s Math class earned the following scores on their last exam: 71, 82, 89, 63, 81, 92, 64, 85, 72, 87.  Create a histogram that accurately displays this data.  First, we need to see if there is any we can put our data into groups, or categories.  We should put our data into groups of _____________________________________

 Make a table that shows how many test scores were in each group. Test Score IntervalsAmount of Tests 60 – – – , 82, 89, 63, 81, 92, 64, 85, 72, 87.

 Next, we will make a graph from our table. Begin by drawing two intersecting lines:

 Use the left side of your paper to set the range from 1 to 5 to match the range from your table.  Then label the bottom of your graph with the test score intervals. 

 What is the number of persons below the age of 60 in the histogram below?

 If 70 and above is considered a passing grade, how many students passed the math test?