Examlex
Environmental change causes the heritable variations in individuals that natural selection acts upon.
Sample Size
The number of observations or subjects included in a study.
Effect Size
A quantitative measure of the magnitude of a phenomenon, used to indicate the size of an effect or difference found in a study.
Type I Error
The incorrect rejection of a true null hypothesis, or a "false positive," in hypothesis testing, indicating that the test suggests an effect that does not actually exist.
Type II Error
A statistical term referring to the error that occurs when a false null hypothesis is not rejected, indicating a false negative finding.
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