SurveyCTO: Because your data is worth it
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The World Health Survey Plus is a multi-topic, multi-mode, and multi-platform survey system to address essential data gaps with the flexibility to adapt Interviewers need to actively listen and question, probe, and prompt further to collect richer data Interviews are ideal when used to document participants'
Sampling methods in data collection · Random sampling · Systematic sampling · Convenience sampling · Clustered sampling · Stratified sampling Having a detailed procedure for collecting the data is important Using a pilot study to trial the protocol an often reveal unexpected changes