In a recently published news story, we learn about a young doctor, Jake Deutsch, and his personal experience with coronavirus disease 2019. Deutsch tested positive for Covid-19 and checked himself ...

Systematic sampling is straightforward and low risk, offering better control. However, it may introduce sampling errors and data manipulation. Understand its benefits and weaknesses here.

PROC SURVEYSELECT provides a variety of methods for selecting probability-based random samples. With probability sampling, each unit in the survey population has a known, positive probablity of ...

Traditional grab sampling methods require supplementary devices such as electric pumps, batteries, charging devices, calibrators, tubing, connectors, and auxiliary equipment. The collection of whole ...

The World Health Organization (WHO) warns that air pollution is of great concern and impacts health in many ways. To better the situation, it’s necessary to focus on air quality. However, when ...

Sampling techniques are discussed. Quota sampling. Another approach is quota sampling; in this method, our selection is guided by creating a sample similar to the population. For example, assuming 30% ...