3244. A teacher should keep his voice in the class

By Admin / September 19, 2025

A. High enough to be heard by every student clearly

B. Loud, so that everyone can hear clearly

C. Moderate

D. Sometime low and sometime high

✅ The correct answer is option D.
A teacher should keep his voice in the class sometime low and sometime high.

3241. Studying the social status of a population, a researcher concluded that Mr. S is socially backward. His conclusion is

3207. When a research problem is related to heterogeneous population, the most suitable sampling method is

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