<prompt> In the WHO recommended EPI Cluster sampling for assessing primary immunization coverage, the age group of children to be surveyed is:-0-12 months6-12 months9-12 months12-23 months  <response>: Cluster random sampling: Used for immunization coverage evaluation Error rate for immunization coverage evaluation - - 5 WHO recommended technique - 30 x 7 Total sample size - 210 Intercluster disparity - even the cluster are not comparable to each other; To remove intercluster disparity, we use DESIGN effect 30 clusters selected by systematic random sampling 