The variables were compared, and where there was a difference of 2 or more percentage points between the achieved interview profile and that of the sample profile, a non-response weight was applied.
Cymharwyd y newidynnau, a lle'r oedd gwahaniaeth o ddau bwynt canran neu fwy rhwng y proffil cyfweliad a gyflawnwyd a phroffil y sampl, defnyddiwyd pwysau diffyg ymateb.