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Standard Score |
Home > Methodology > Evaluation Criteria > Standard Score |
| Broadly, normalization is a process that makes the votes more normal by conforming to some regularity. In statistics, a standard score indicates how many standard deviations an observation or datum is above or below the mean. It is a dimensionless quantity derived by subtracting the population mean from an individual raw score and then dividing the difference by the population standard deviation. This conversion process is called standardizing or normalizing. |
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The z-score is most often used in the z-test in standardized testing – the analog of the Student's t-test for a population whose parameters are known, rather than estimated. As it is very unusual to know the entire population, the t-test is much more widely used. A standardized test is a test designed in such a way that the questions, conditions for administering, scoring procedures, and interpretations are consistent and are administered and scored in a predetermined, standard manner. Learn more about Standardized Tests at wikipedia. |
