Question

First, the population is subdivided by district. then a quality assurance analyst uses a random number...

First, the population is subdivided by district. then a quality assurance analyst uses a random number generator to select fifteen members from each district to study.

identify the sampling technique.

Cencus

Stratified sampling

Systematic sampling

simple random sampling

cluster sampling

convienceence sampling

Math   Statistics-And-Probability   
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Answer #1

When a population is is subdivided by some set of characteristics and same no of samples are taken randomly from each subdivided groups then the groups are called as strata and rhe sampling is called as stratified sampling.

Sometimes the stratified sampling is little confused by cluster sampling, in cluster sampling we divide the pupoulation in some groups and select a random sample from any of the group, so, here rhe correct option will be

Stratified sampling

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