How to Convert T-Scores to Percentiles

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T-Scores are mostly used on standardized psychological tests and some medical tests. The scores are designed so that a score of 50 is considered average and the standard deviation is 10. These scores are easily converted into other standardized measurements. You may use a standardized score conversion chart to convert T-scores to percentiles for example. These charts are widely available online and make the conversion a simple task that anyone may perform.

    Open a score conversion table in your Internet browser (see Resources).

    Locate the line that shows the T-score you wish to convert.

    Trace the line to the percentile column to see the corresponding percentile.

    Things You'll Need

    • Internet connection
    • T-Score

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