## Probability Sampling

### In which subjects of the population get an equal opportunity to be selected as a representative sample

Probability sampling is a method of selecting a sample from a population in which every member of that population has an equal chance of being selected for inclusion in the sample. This sampling method follows statistical principles and ensures that the sample is representative of the population and that the results obtained from the sample can be generalized to the population accurately.

Some of the most common probability sampling techniques include simple random sampling, stratified sampling, and cluster sampling.

Simple random sampling involves selecting individuals from the population at random, with each individual having an equal chance of selection. This method is an unbiased way to select a sample from a population, ensuring that there is no systematic bias in the selection process.

Stratified sampling involves dividing the population into groups or strata based on a particular characteristic and then selecting individuals from each stratum at random. This method ensures that the sample is representative of the population while also allowing for comparisons between strata.

Cluster sampling involves dividing the population into smaller clusters, selecting a few clusters at random, and then selecting individuals from within those clusters. This method is useful when studying large populations that are geographically dispersed.

Overall, probability sampling is a crucial tool for researchers in ensuring that the sample obtained from a population is representative of that population and that the results obtained can be extrapolated with confidence to the broader population.

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