an analysis where the results may not be of as high quality as those in our routine statistical releases and bulletins, but where meaningful conclusions can still be drawn from the results.
dadansoddiad lle nad yw'r canlyniadau o ansawdd mor uchel â'r rhai yn ein datganiadau ystadegol a'n bwletinau arferol, ond lle gellir dod i gasgliadau ystyrlon o'r canlyniadau o hyd.