discrepancy - A difference between scores , deficit - A standard score of at least 1.5 Sd below the norm ie 100 , scaled score - A score with a. range of 1-20 with a SD of 3, Composite score - a combination of scores form closely related subtests , stanine - Distribution curve is separated into nine sections and scores range from 1-9 , normal distribution curve - a smooth symmetrical curve (bell shaped) with mathematical properties, Standard deviation  - the Standard Deviation is the average amount by which scores differ from the mean. One SD is 15 points., reliability  - reliability is the degree to which a test provides consistent results, validity - does the test really measure what is says it does?, SEM - standard error of measurement ,

Statistical terms by Dittas Training

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