nonprobability sample

Nonprobability sampling does not meet this criterion and should be used with caution.

Nonprobability sampling techniques cannot be used to infer from the sample to the general population.

This would be contrasted with nonprobability sampling where arbitrary individuals are selected.

Any generalizations obtained from a nonprobability sample must be filtered through one's knowledge of the topic being studied.

Performing nonprobability sampling can be considerably less expensive than doing probability sampling.

Examples of nonprobability sampling include:

An open access poll is a type of opinion poll in which a nonprobability sample of participants self-select into participation.

Nonprobability sampling methods include accidental sampling, quota sampling and purposive sampling.

Hence, because the selection of elements is nonrandom, nonprobability sampling does not allow the estimation of sampling errors.

In statistics, self-selection bias arises in any situation in which individuals select themselves into a group, causing a biased sample with nonprobability sampling.

Conversely, the impossibility of random sampling sometimes necessitates nonprobability sampling, such as convenience sampling or snowball sampling.

Any use of nonprobability sampling methods (e.g., cut-off or model-based samples) must be justified statistically and be able to measure estimation error.

Accidental sampling (sometimes known as grab, convenience or opportunity sampling) is a type of nonprobability sampling which involves the sample being drawn from that part of the population which is close to hand.

Nonprobability sampling is any sampling method where some elements of the population have no chance of selection (these are sometimes referred to as 'out of coverage'/'undercovered'), or where the probability of selection can't be accurately determined.

In addition, within these states, we interviewed officials from a total of eight regulatory entities, seven industry-related state associations, two consumer-oriented state associations, and an attorney general s office.10 Because we used nonprobability sampling to select case study states, the information we obtained from these five states cannot be generalized to all states.