Funnels and scatters
Another reminder that aggregate trends hide information

Four numbers, not as easy as it seems

Longtime reader Aleksander B. wasn't convinced by the following chart shown at the bottom of AFP's infographic about gun control.


He said:

Finally I was able to figure who got some support from NRA. But as a non-US citizen it was hard to get why 86% of republican tag points to huge red part. Then I figured out that smaller value of alpha channel codes the rest of republicans. I think this could be presented in some better way (pie charts are bad in presenting percentages of some subparts of the same pie chart - but adding a tag for 86% while skipping the tag for remaining 14% is cruel).

It's an example of how a simple chart with just four numbers is so hard to understand.


Here is a different view of the same data, using a similar structure as the form I chose for this recent chart on Swedish trade balance (link).



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Cody Custis

This seems like a case where a map of the United States with each representative having a hexagon or block and shading to represent party affiliation / donations would be useful. I predict that most of the donations are to politicians in the West and South.

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