Know your data 40: when they know where you are
When big data are used against your interest
numbersense
Correlation and causation
Does giving compliments improve team performance?
Doping pops up in the news
The world of anti-doping has interesting statistics
The most dangerous day
The most dangerous day in one's life
How would we know if Google engineers really improved traffic flow at intersections
It's not easy to measure the real-world impact of optimizations.
Dead people, fake obituaries, and ad fraud
A story involving dead people, faked obituaries and digital ads.