Pupils entitled to free school meals have been less likely to attend school, with the gap being an average of 6.9 percentage points between 3 to 6 May.
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 6.9 pwynt canran rhwng 3 i 6 Mai 2022.