Amongst many fascinating stories in Malcolm Gladwell's Outliers, chapter eight has one that brings back a strange memory for me. And one that should remind us to always question whether the data we are shown really supports the conclusions we draw from it.

... or so it might seem if you take polling results seriously.

In a recent poll, 9% of New Yorkers said they were planning to head to DC for the event. There are about 16 million adults in the New York area, suggesting 1.4 million people planned to make the trip.

There are some occasions where you need to keep your data gathering quiet!

From the excellent XKCD. 

I also love this one.

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