Using the average price of a beer can be quite misleading. Without knowing how popular each beer is, it is unlikely to provide a sense of what locals are actual

Using the average price of a beer can be quite misleading. Without knowing how popular each beer is, it is unlikely to provide a sense of what locals are actually paying for beer. A better methodology might have been to compute the expected value of a beer (essentially weighting the price of a beer by the probability of purchase of that beer) (Also, as others have noted, the standard size of a beer varies, so only including data for a particular size can bias the results). Knowing the price/ml might be an interesting statistic too, but it would have been good to know the price of a beer (for whatever ‘a beer’ means locally)