Why does this article not even once mention that average could mean "mean", "median" and/or "mode"? Even the title alludes to one of the biggest problems in the domain and that is that many people don't even realise that there is more than one way to measure an average.

There are plenty of examples of where the mean is not representative of the sample and where mode or median would be more realistic, particularly where some large outliers in a relatively small sample would skew the mean.