The Ways of Conducting Random Sampling Are as Follows: Simple random sampling – In this sampling method, each item in the population has an equal probability of getting selected in the sample.

The first video in Pew Research Center’s Methods 101 series helps explain random sampling – a concept that lies at the heart of all probability-based survey research – and why it’s important.

Haibo Zhou, Wangli Xu, Donglin Zeng, Jianwen Cai, Semiparametric inference for data with a continuous outcome from a two-phase probability-dependent sampling scheme, Journal of the Royal Statistical ...

A statistically designed random sampling scheme, based on as few as 100 people, would give a very high probability of detecting if there are any COVID-19 cases and highlight at-risk hotspots.

We assume that the natural first-phase sample is collected with probability of selection proportional to size for each unit. The objective is then to use the ranked set sampling procedure to obtain a ...