Category: Biostatistics

Standard deviation (SD) Standard deviation is the square root of the mean of the squared deviations…

Non-Probability Sampling Convenience Sampling It is also known as accidental, accessibility or haphazard sampling. The major…

Multistage Sampling             In cluster sampling, after selecting the desired number of clusters, all the units…

Cluster Sampling Cluster sampling consists in grouping the population units suitably and then selecting some of…

Example of Circular Systematic Sampling: If N = 11, n=4, then k = 2. 75 Select…

Example of Linear Systematic Sampling: Consider a finite population consisting of N = 48 units (Children…

Systematic Sampling Systematic sampling has got the nice feature of selecting the whole sample with just…

Stratified random sampling Very often, the population to be investigated is not homogeneous. In order to…

Simple random sampling In this method, each member (sampling unit) of the population has an equal…

Probability Sampling Five methods of drawing samples under probability sampling are described below: Simple random sampling…