TIMSS: International and U.S. Response Rates - International and U.S. Response Rates -

International and U.S. Response Rates

Table 3. Coverage of target populations, school participation rates, and student participation rates by education system, advanced mathematics: TIMSS Advanced 2015
Education system	Average age at time of testing	Percentage of international target population coverage	Overall exclusions from national target population	Weighted school participation rate before substitution (%)	Weighted school participation rate after substitution (%)	Weighted student participation rate (%)	Combined weighted school participation and student participation rate with substitute schools (%)
— Data was not reported. ¹ Intensive courses are advanced mathematics courses that involve 6 or more hours per week. Results for students in these courses are reported separately from the results for other students from the Russian Federation taking courses that involve 4.5 hours per week. NOTE: Education systems in the Southern hemisphere administered TIMSS 2015 in the fall of 2014 while those in the Northern hemisphere administered the assessment in the spring of 2015. SOURCE: International Association for the Evaluation of Educational Achievement (IEA). Trends in International Mathematics and Science Study (TIMSS) Advanced, 2015.
France	18.0	100	4.7	99	99	96	95
Italy	18.9	100	1.1	88	94	97	90
Lebanon	17.8	100	1.3	70	70	98	68
Norway	18.7	100	1.4	100	100	93	93
Portugal	—	100	0.3	80	87	93	80
Russian Federation	—	100	0.3	100	100	98	98
Russian Federation (intensive courses)¹	17.7	100	1.1	100	100	98	98
Slovenia	18.8	100	2.5	89	89	87	75
Sweden	18.8	100	1.7	99	99	90	88
United States	18.1	100	0.1	72	76	87	66