The sample included three participants from minority ethnic backgrounds, two from faith schools and seven from schools with above Local Authority average for free school meals.
Roedd y sampl yn cynnwys tri chyfranogwr o gefndiroedd ethnig lleiafrifol, dau o ysgolion ffydd a saith o ysgolion â lefel uwch na chyfartaledd yr Awdurdod Lleol ar gyfer prydau ysgol am ddim.