percentiles - TRANSFORMED SCORES - PERCENTILE RANKS...

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TRANSFORMED SCORES - PERCENTILE RANKS OBJECTIVE: To provide first hand experience with transformed scores thereby increasing understanding. Test results, especially standardized tests, are typically reported in transformed score units. For example, an examinee may get 50 correct answers on a standardized intelligence test. But the number “50” has no meaning. We can transform the raw score of 50 to an IQ score and a percentile score, two scales with known properties. For example, a raw score of 50 may convert to transformed scores of 115 IQ and the 84th percentile. Both of these latter values have meaning to most people in our society. GENERAL INFORMATION: In this section, we provide a brief overview of transformed scores in general as well as some information on specific transformed scores referred to as percentiles. This exercise will focus only on percentile scores. A percentile may be defined as a raw score that has been converted into an expression of the percentage of a distribution that falls below a particular raw score.
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percentiles - TRANSFORMED SCORES - PERCENTILE RANKS...

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