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Cluster Sampling is a type of probability sampling where a population of interest is divided into mutually exclusive and collectively exhaustive sub-groups (or clusters) and a sample of clusters is selected. From the selected clusters, a sample of units is drawn.
Cluster Analysis is an analytical technique that arranges research data into mutually exclusive and collectively exhaustive groups (or clusters) where the contents of each cluster are similar to each other but different from the other clusters in the analysis.
Closed-ended Questions provide respondents with a pre-determined list of possible answers.
Central Location Interviewing is when face-to-face interviews are conducted at one or more specified locations (eg. mall intercept interviewing).
Census is the collection of data from all available units in a population of interest.
Cell refers to a sub-sample of respondents in a research study.
CAWI is computer-aided web interviewing, where respondents complete a web site (or HTML) survey and some computer software, presents each question only after the previous question has been completed. Subsequent questions can be tailored to previous question answers, enabling sophisticated routing plans to be used in these surveys.
CATI is computer-aided telephone interviewing where the responses are keyed directly into a computer and administration of the interview is managed by a specifically designed program. The program checks for invalid responses and will not accept responses outside prescribed limits, hence subsequent editing and keying in of data are avoided.
CAPI is computer-aided personal interviewing, where the responses in a personal interview are keyed directly into a computer and the administration of the interview is managed by a specifically designed program. The program checks for invalid responses and will not accept responses outside prescribed limits, hence subsequent editing and keying in of data are avoided.
Call-back (aka Recall Interview) is a repeat telephone call to a potential respondent to see if they can participate in a survey.
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