Choose one non-probability sampling technique, define it, and explain a situation when this would be the best technique to use

Question

What will be an ideal response?

Answer 1

Convenience sampling (also accidental or availability sampling) is a sampling technique that relies on subjects who are close at hand or easy to access. This technique is most useful when seeking an inexpensive, fast means to do exploratory research on a new topic. Purposive sampling (also judgmental sampling) is a sampling technique in which researchers use their special knowledge or expertise to select subjects who are representative of the studied population. This type of sampling is not widely generalizable, so is best used to obtain rich, detailed description from a population. Snowball sampling (also chain referral sampling or respondent driven sampling) is a sampling technique in which a small group of subjects provides referrals to more subjects with similar characteristics. Eventually the group grows to a large enough size or snowballs, as more subjects are obtained who provide more referrals. This technique is best used when investigating a sensitive topic like drug use or prostitution, in which people who engage in this behavior may not be willing to come forth due to censure. It is also useful when investigating a hard to reach population. Quota sampling is a sampling technique in which a table is filled with attributes. A percentage of the target population is determined who possess those attributes. The sample is then made up of numbers of people who match the percentages seen in the entire target population. This technique is very useful when trying to capture data on age cohorts.