Medical MCQ-A population is divided into relevant subgroups and random sample selection is done from each of the subgroups. This is which type of sampling method?

A population is divided into relevant subgroups and random sample selection is done from each of the subgroups. This is which type of sampling method?

Systematic random sampling

Stratified random sampling

Simple random sampling

Cluster sampling

Question Category:

Social & Preventive Medicine

Correct Answer:

Stratified random sampling

Description:

- in stratified random sample, the sample is deliberately drawn in a systematic way so that each poion of the sample represents a corresponding strata of the universe. - this method is paicularly useful where one is interested in analysing the data by a ceain characteristic of the population. Reference : Park's textbook of preventive and social medicine, 23rd edition, pg no:850

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