Examlex
____________________ means that chat users and the people with whom they are conversing are online at the same time.
Random Sampling
A technique for selecting a sample from a population in a way that every member has an equal chance of being chosen.
Educated Guess
An assumption or prediction made based on known facts and logical reasoning, despite the absence of complete information.
Empirical Evidence
Information acquired by observation or experimentation that is used to confirm or disprove a hypothesis or theory.
Theory
A system of ideas intended to explain something, based on general principles independent of the thing to be explained.
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