This is a preview. Log in through your library . Abstract Sample surveys are used to investigate occurrence and determinants of diseases in populations. Their reliability is influenced by quality of ...

Sampling is a technique in which samples are drawn at random (without any favor or bias). For this, suitable measures or procedures may be laid down and adopted according to the nature and ...

We compare the predictive accuracy of preelection polls using two types of sampling frames, random digit dialing (RDD) and registration-based sampling (RBS). The latter involves stratified random ...