Is Stratified Sampling Probability or Nonprobability?

Quota sampling is somewhat similar to stratified sampling, which is probability sampling, in that similar units are grouped together. However, it differs in how the units are selected.

Is stratified sampling probability?

Stratified random sampling is a type of probability sampling using which a research organization can branch off the entire population into multiple non-overlapping, homogeneous groups (strata) and randomly choose final members from the various strata for research which reduces cost and improves efficiency.

Is stratified sampling non-probability?

Connection to stratified sampling

Quota sampling is the non-probability version of stratified sampling. In stratified sampling, subsets of the population are created so that each subset has a common characteristic, such as gender.