Saturday, October 6, 2018

Bad Data from Bad Math

When presenting data and trying to put research into a picture people can understand, scientists use a wide variety of graphs and charts. This is all for the sake of interpreting their data… usually. There are those few times where one finds that graph that seems a little, well, off or even biased.

This bad data can skew the perceptions of the people who read it about the subject or issue in question simply because those who made the graph desired a certain effect from it. People can read about things all they want, but graphs and numbers can really put things into perspective. This makes it all the easier to manipulate data the slightest bit with a bad or biased presentation.

See the graph below:
Your Marathon Weekend Itinerary 
Description: This graph shown on Fox News about six years ago was supposed to be a representation of the 2012 Republican presidential nomination. More specifically, it aimed to show, in percentages, how much chance each candidate had of being nominated. The candidates were Mike Huckabee, Mitt Romney, and Sarah Palin. The graph showed that Huckabee had a 63% chance, Romney a 60% chance, and Palin a 70% chance.
Source: https://www.nbcchicago.com/news/local/FOX-News-Chart-Fails-Math-73711092.html

Now, I am sure that viewers noticed something right off the bat. The chart has a glaringly obvious issue. The fact that it is a pie chart means the percentages must add up to 100%. However, these three add up to 193%. This is the main problem that really caught my eye. How these numbers ended up being represented this way is beyond me, but something definitely went wrong in the math. Another thing: even just two of them added up together already breaches 100%. Why are they all so high? This makes it seem like all the Republican candidates have a high chance of being nominated and that they are almost equally popular, though the viewers of the graph would still get the impression that Palin was still most likely to win.

What is even more baffling is that this fairly inaccurate chart was shown on a well-known news channel for all to see. This certainly must have discredited their information and sources somewhat. The creators of the graph should perhaps see about checking their math next time. Whether these percentages were expressed this way purposefully or accidentally, always remember: don't be fooled by bad data.