For which of the following sampling, a Design effect is used?: (A) Simple random sampling, (B) Systematic random sampling, (C) Cluster random sampling, (D) Stratified random sampling
Answer is C. DESIGN EFFECT

Definition: Adjustment used in few study/sampling designs to allow for design structure, especially to allow for correlations among cluster of observations
Uses:

– Cluster randomised trials
– Cluster random sampling
– Multistage sampling
– Health facility cluster survey