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Data Session 3, Part B: Histograms
 
Session 3 Part A Part B Part C Part D Homework
 
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Session 3, Part B:
Histograms

In This Part: Constructing a Histogram | Completing the Histogram | Interpreting a Histogram

You are now ready to complete the histogram based on the line plot you created:

Histogram step 1

• 

Draw a rectangle over each value on the horizontal axis with a height corresponding to the frequency of that value:

bars around dots

(Note that the frequency of each value on the horizontal axis is still indicated by the number of dots within each rectangle.)

• 

Remove the dots, shade the rectangles, and add a vertical scale to indicate the frequency of each interval on the horizontal scale:

A Histogram

You have just created a frequency histogram!

 
 

The following Interactive Activity reviews the transitions between the various displays of data you've worked with so far in this session, using the 26 data values from Part A.

This activity requires the Flash plug-in, which you can download for free from Macromedia's Web site.


 

Problem B1

Solution  

What advantages does a histogram have over a stem and leaf plot? What are the disadvantages of a histogram?

 
 

Just as with groupings in a stem and leaf plot, you can change the size of the intervals in a histogram depending on the situation. Your goal is to organize your representation so that you can present the data in the most meaningful way.

Next > Part B (Continued): Interpreting a Histogram

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