Using existing statistics (or ‘secondary’ data) alone to assess their accommodation needs would be unlikely to yield results which are statistically robust.
Byddai dim ond defnyddio ystadegau sydd eisoes ar gael (neu ddata ‘eilaidd’) i asesu eu hanghenion llety yn annhebygol o arwain at ganlyniadau sy’n ystadegol gadarn.