One danger is looking for correlations in a dataset means you will find them. It could be by noise. I can't even see what the percentages are in the visualizati

One danger is looking for correlations in a dataset means you will find them. It could be by noise. I can't even see what the percentages are in the visualization, when you move the mouse it changes the view, it is quite annoying. Let's say you have a room full of developers and 15% of them have their birthday in May. Do you make conclusions from this? What is the chance of that happening purely by chance given that all developers had a pretty-much equal chance of being born on any given month.