Probability sampling allows for known selection probabilities and error estimation, while nonprobability sampling lacks random selection and error estimation. Quota sampling involves selecting from predetermined subgroups within a population.
Probability sampling is a sampling method in which every unit in the population has a known probability of being selected. This method allows for the estimation of sampling errors and helps in generalizing findings back to the population.
On the other hand, nonprobability sampling involves selecting units based on non-random criteria, such as quota or convenience. This method does not allow for the estimation of sampling errors and may lead to sampling bias.
Quota sampling is a type of nonprobability sampling where researchers identify subgroups within a population and select a predetermined number of elements from each subgroup.
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