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 8 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,12.55,20.25,15.25, 18 to 29 years,13.62,23.11,19.49, 30 to 34 years old,19.12,31.89,24.25, Notes: 1) Mobility: Moving abroad for study or training 2) CNED 8: Doctorate Education Source: INE