Survey on International Mobility of Students SAMPLING ERRORS Sampling errors relative to persons from 18 to 34 years old that have reached at least CNED 2 formation level (or they are carrying out these studies) by age group and case of mobility Units: Coefficient of variation ,Total,Moved abroad,Did not move abroad, TOTAL,0.09,12.82,0.20, 18 to 24 years old,0.22,16.74,0.38, 25 to 29 years old,0.32,25.59,0.49, 30 to 34 years old,0.21,22.93,0.27, Notes: 1) Mobility: Moving abroad for study or training 2) CNED 2: First stage of Secondary Education Source: INE