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Table 6 Average p-values for the NF and F item categories in TIMSS 2011 grade 8 mathematics

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

  NF average p-value (%) F average p-value (%) Difference NF–F (%)
East Asia group 71.0 65.0 6.0
Eastern Europe group 52.9 49.4 3.5
Western group 39.4 30.2 9.2
Norway and Sweden 39.1 24.7 14.5
Norway 39.1 22.5 16.6