Examlex
Water purification often involves screening,flocculation and sedimentation,sand filtration,aeration,and disinfection.Explain what is meant by each of these terms.
Stratified Sample
A method of sampling that involves dividing a population into subgroups and then taking a sample from each subgroup to ensure representation.
Adult Population
Refers to the segment of society that includes individuals considered legally adults, typically over the age of 18.
Unobtrusive Method
Research techniques that study behaviors and phenomena without intervening or altering the subjects' natural environment.
Field Studies
Research activities conducted in real-world settings as opposed to controlled or laboratory environments.
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