Pupils entitled to free school meals have been less likely to attend school, with the gap being an average of 4.5 percentage points between 6 to 10 June.
Mae disgyblion sydd â hawl i brydau ysgol am ddim wedi bod yn llai tebygol o fynychu’r ysgol, gyda’r bwlch ar gyfartaledd yn 4.5 pwynt canran rhwng 6 i 10 Mehefin 2022.