O faes ystadegau, pan fydd pobl yn cael eu dewis i fod yn rhan o arolwg.
Mae dwy ffordd o'u dewis - sef probability sampling
A probability sampling method is any method of sampling that utilizes some form of random selection. In order to have a random selection method, you must set up some process or procedure that assures that the different units in your population have equal probabilities of being chosen.
a 'non-probability sampling'
The difference between nonprobability and probability sampling is that nonprobability sampling does not involve random selection and probability sampling does. Does that mean that nonprobability samples aren't representative of the population? Not necessarily. But it does mean that nonprobability samples cannot depend upon the rationale of probability theory.
Sampl tebygolrwydd yw 'probability sample' yn ol y Porth Termau. Ond sut mae cyfieithu 'non-probability sampling' - samplu nad yw ar sail tebygolrwydd?
Byddwn yn falch o unrhyw help.
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Pennaeth yr Uned Gyfieithu/Head of Translation Unit
Canolfan Bedwyr
Prifysgol Bangor/Bangor University
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