Comparing results internationally, Dr Thomson said that Australia performed equal 10th in science, equal 12th in reading and equal 20th in mathematics, after accounting for
insignificant differences between countries and economies.
The committee found many instances in which a
country's ranking goes up in a given release year, but its mean score goes down — meaning that
countries are ranked higher but doing worse — or where the
differences between ranked jurisdictions» scores are so statistically
insignificant that the act of ranking them adds a meaning that isn't there.