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The purpose of all charts and graphs is to
represent data. From pie charts, to scatter
plots, to histograms, each graph (or
graphical data representation) is designed
to make reading a set of data easier.




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By their very nature, all graphs tell an “exact” story of
data, meaning graphs can only show what the data
behind them dictates. However, that statement is
incomplete, especially with regards to histograms.
Because histograms are flexible, they can also be
made to conceal or seem to tell a different story of
the underlying data.
                                        Website Visit Duration Histogram
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        Number of visits




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Thus, one of the histograms greatest strengths—
its flexibility—can also be one of its greatest
weaknesses. You’ll learn more about this in the
next learning activity.


                                      Website Visit Duration Histogram
                         25
      Number of visits




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                                                  Visit Duration in Minutes
The key idea to remember is that the “story of
data” is only as good as the data you use and the
way you choose to present it.

Choosing the proper data representation tool is
crucial to telling the right story to your
stakeholders.


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CRITICAL THINKING: What are some other
       graphical data representation tools, and what
       situations might you use them in?




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  • 1.
  • 2. The purpose of all charts and graphs is to represent data. From pie charts, to scatter plots, to histograms, each graph (or graphical data representation) is designed to make reading a set of data easier. 0 10 20 30 40 50
  • 3. By their very nature, all graphs tell an “exact” story of data, meaning graphs can only show what the data behind them dictates. However, that statement is incomplete, especially with regards to histograms. Because histograms are flexible, they can also be made to conceal or seem to tell a different story of the underlying data. Website Visit Duration Histogram 25 Number of visits 20 15 10 5 0 1 2 3 4 5 6 7 8 9 10 More Visit Duration in Minutes
  • 4. Thus, one of the histograms greatest strengths— its flexibility—can also be one of its greatest weaknesses. You’ll learn more about this in the next learning activity. Website Visit Duration Histogram 25 Number of visits 20 15 10 5 0 1 2 3 4 5 6 7 8 9 10 More Visit Duration in Minutes
  • 5. The key idea to remember is that the “story of data” is only as good as the data you use and the way you choose to present it. Choosing the proper data representation tool is crucial to telling the right story to your stakeholders. 25 20 15 10 5 0 0 20 40 60
  • 6. CRITICAL THINKING: What are some other graphical data representation tools, and what situations might you use them in? 25 20 15 10 5 0 0 20 40 60