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A researcher divides the city of Flint, Michigan, into 500 blocks of 10 households each. She requires a sample of 400 households. She selects a sample by randomly selecting 100 blocks and randomly selecting 4 households per block. This is an example of .
Scientific Theory
A well-substantiated explanation of some aspect of the natural world, based on a body of facts that have been repeatedly confirmed through observation and experiment.
System Of Assumptions
A coherent collection of beliefs and theories that form the basis for a particular methodology or approach to understanding and interpreting the world.
Personal Opinion
An individual's specific thoughts or beliefs about a subject, which may not be based on fact or knowledge and can vary greatly from person to person.
Empirical Proof
Evidence that serves to either support or counter a scientific theory or hypothesis, obtained through direct observation or experimentation.
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