Learn the distinctions between simple and stratified random sampling. Understand how researchers use these methods to accurately represent data populations.

The method of systematic random sampling (METHOD=SYS) selects units at a fixed interval throughout the sampling frame or stratum after a random start. PROC SURVEYSELECT chooses the first unit randomly ...

A study by the universities of Cordoba and Seville develops a method that makes it possible to verify, easily and quickly, whether an olive plantation is traditional, intensive, or super-intensive.

The method of simple random sampling (METHOD=SRS) selects units with equal probability and without replacement. Each possible sample of n different units out of N has the same probability of being ...

Prasanta Chandra Mahalanobis, the Indian statistician who founded the Indian Statistical Institute and pioneered large-scale sample survey methodology, changed how the world collects data. His methods ...

Dr Jacob John, former chief of ICMR's Centre for Advanced Research in Virology, speaks to TOI on why the outcome of random sampling may not be a correct measure of the extent of the Covid-19 threat ...