Examlex
During the second trimester of pregnancy, _____ typically is used to diagnose fetal genetic disorders.
Descriptive Research
A research method aimed at describing characteristics of a population or phenomenon being studied without influencing those characteristics.
Representative Sample
A smaller group taken from a larger population that truly represents all members of that population.
Scientific American
A popular science magazine that features articles on various scientific topics for a general audience.
Operational Definition
A description of a variable in terms of the specific process or set of validation tests used to determine its presence and quantity.
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