Examlex
Given forecast errors of -5,-10,and 15,what is the mean absolute deviation?
Contrasted-Groups Method
A statistical method used in psychometrics to validate the effectiveness of a test by comparing the scores of groups with known differing characteristics.
Validity
The degree to which a test, tool, or study accurately measures or assesses what it is intended to.
Reliability
The degree to which an assessment tool produces stable and consistent results over time.
Validity
The extent to which a concept, conclusion or measurement is well-founded and likely corresponds accurately to the real world.
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