Why is a sample often used instead of measuring every member of a very large population?

Type: MCQ • Marks: 1

A. It removes all possible bias

B. It means no measurements are needed

C. A sample always gives a perfect answer

D. It can make investigation practical, if selected appropriately

Explanation

A suitable sample can make a study manageable, although sampling error and bias remain possible.

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Class 9th Science (MCQ)

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