A nonprobability sampling technique in which an initial group of respondents is selected and subsequent respondents are selected based on the referrals or information provided by the initial respondents is called:

snowball sampling

Explanation:

Snowball sampling is a nonprobability sampling technique in which an initial group of respondents is selected and subsequent respondents are selected based on the referrals or information provided by the initial respondents.

It should be noted that in snowball sampling, after the respondents have been interviewed, theywould be told asked to help identify other people

that also belong to the target population.

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