There is more variability within the tallest group (the Dutch) and the shortest group (Mbuti pygmies) than between the averages of those two groups.

Question

Quizplus · Accepted Answer

This is because within any population, there will always be individuals who fall outside of the average range. So while the Dutch may, on average, be taller than the Mbuti pygmies, there will still be some Dutch people who are shorter than some Mbuti pygmies. This variability within each group can often be greater than the difference between their average heights.

There Is More Variability Within the Tallest Group (The Dutch)