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Table 9 Differences between average p-values for NF items and F items in TIMSS Advanced 2015 mathematics

From: The dependence on mathematical theory in TIMSS, PISA and TIMSS Advanced test items and its relation to student achievement

Country Difference NF–F, mathematics (%)
Norway 12.54
Sweden 9.79
USA 10.53
Russia 4.46
France 12.13
Slovenia 8.98
Portugal 10.96