Sut mae'r Llywodraeth yn sicrhau bod ganddi'r ystadegau sydd eu hangen arni i lywio polisi?

(Ddim wedi ei gyfieithu)

The use of statistics and evidence is an integral part of the policy-making process. Welsh Government statisticians routinely collaborate with policy makers to identify statistical needs, and inform policy through the regular collection, analysis and publication of a wide range of statistics about Wales.