Higher or lower
Two countries at a time. Pick the one with the higher published average, and keep going until you get one wrong. Unlimited, unlike the daily, and it counts for nothing except a run you can beat.
Which country has the higher published average?
The pairs are not drawn at random from the whole table. Two countries are only offered together when their published figures differ by between 0.6 cm and 3.5 cm. Closer than that and the honest answer is that nobody could know. Further apart and the stereotype answers it for you, which is the opposite of what this game is for.
The country in today's puzzle never appears here, and neither do the days either side of it. Every figure on this page is one the country pages already publish, with the study behind it.