In the graph below, a normal distribution is shaped like a bell, hence its nickname the bell curve, with the middle of the curve representing the mean.

The frequency distribution is shown in a column chart. Note, you can choose a line chart, bar graph or XY Scatter chart, if those suit your data presentation better.

With years of data from professional Dota 2 in our hands, we take a look at how closely games adhere to a normal distribution, also known as the bell curve.