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A researcher selects 20 schools at random from a district and surveys all the pupils of Class VIII in those schools. This sampling techniqu…

2726Hard UPSC Principal Vice Principal 0 replies 4 views

A researcher selects 20 schools at random from a district and surveys all the pupils of Class VIII in those schools. This sampling technique is known as:

ASimple random sampling
BStratified random sampling
CSystematic sampling
DCluster sampling

Correct answer: D

Explanation

Selecting whole groups (schools) and studying every unit within the selected groups is cluster sampling.

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