Examlex
After children begin to receive formal arithmetic instruction in first grade, addition problems are solved less frequently by counting fingers while they are solved more frequently by counting mentally.
Null Hypothesis
A type of hypothesis used in statistics that proposes that no statistical significance exists in a set of given observations.
Research Hypothesis
A specific, testable prediction about the expected outcome of a study.
Representative Sample
A segment of the population that precisely mirrors the characteristics of the whole population.
Population
The entire group of individuals or instances about whom the research is focused.
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