English and Logical Reasoning Prep GuideLogical ReasoningArithmetic Reasoning

Estimates based on cluster samples are usually more reliable:

Options

APer unit time
BPer unit cost
CPer unit area
DNone of these

Correct answer

B. Per unit cost

Step-by-step solution

We use cluster sampling in market research. When we cannot get the proper information about the whole population, so we take a cluster for information, and it is very economical and practical.

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