Survey on International Mobility of Students SAMPLING ERRORS Sampling errors relative to persons from 18 to 34 by age group and cases of mobility in other organised activities of training different from formal education Units: Coefficient of variation ;Moved abroad;Did not move abroad; TOTAL;3.82;0.18; 18 to 24 years old;6.69;0.31; 25 to 29 years old;7.50;0.35; 30 to 34 years old;7.61;0.35; Notes: 1) Mobility: Moving abroad for study or training 2) In other organised activities of training different from formal education are included not only seminaries, courses, workshops, etc., and also the participation, for example, in european programs to exchange experiences between young persons, initiative or creativity promotion, etc. Source: INE