Examlex
________ refers to an extraneous variable attributable to changes in the test units themselves that occur with the passage of time.
Darwin
Charles Darwin, a 19th-century naturalist known for his contributions to the science of evolution and his theory of natural selection.
Population
The entire group about which the investigator wants to draw conclusions.
Traits
Characteristics or qualities that define an individual's personality or biological attributes.
Generation
The act of producing or creating something, or a group of individuals born and living at about the same time.
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