because it is. An economically efficient sampling techniquein which the primary sampling unit is notthe individual element in the population but a large cluster of elements; clusters are selected randomly. Multistage area Sampling:When a cluster of the sample is made then one or more clusters are randomly chosen and everyone within the chosen cluster is sampled.oA political pollster investigating an election in Arizona might first choose counties within the state to ensure that the different areas are represented in the sample. In the second step, precincts within the selected counties may bechosen. As a final step, the pollster may select blocks (or households) within the precincts, then interview all the blocks (or households) within the geo- graphic area. This used method is appropriate because it is sampling that involves using a combination of two or more probability sampling techniques. Non-probability Sampling:Sampling technique where a unit in the population are selected based on predetermined factors. Convenience sampling:that consists of people who are easy to contact oTalking to people in a mallJudgment sampling:The judgment of the investigator chooses the elements that are selected for the sampleoA TV researcher wants a quick sample of opinions about a political announcement. They stop what seems like a reasonable cross-section of people in the street to get theirviews. This used method is appropriate because it is a typeof nonrandom sample that is selected based on the opinionof an expert. Downloaded by:: bryce0736 | [email protected]Distribution of this document is illegal
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Stuvia.com - The study-notes marketplaceQuota sampling:Collecting representativedatafrom a group. But quota sampling requires that representative individualsare chosen out of a particular subgroup.oAn interviewer may be told to sample 200 females and 300males between the age of 45 and 60. This means that individuals can put a demand on who they want to sample (targeting). Interviewers might be tempted to interview those people in the street who look most helpful, or may choose to use accidental samplingto question those closest to them, for time-keeping sake. This used method isappropriate because it is a non-probability sampling technique wherein the assembled sample has the same proportions of individuals as the entire population with respect to known characteristics, traits or focused phenomenon.Snowball sampling:A sampling technique where current study subjects find the future subjects from among their acquaintances.oIf a researcher wishes to interview undocumented immigrants from Mexico, he or she might interview a few undocumented individuals that he or she knows or can locate and would then rely on those subjects to help locate more undocumented individuals. This process continues until the researcher has all the interviews he or she needs or until all contacts have been exhausted. This used method is appropriate because it is a non-probability
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