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Sheri got her son’s standardized achievement scores back. one of the things she noted was that her son achieved a national percentile ranking of 89 in math. This score represents a norm-referenced score.
In statistics, a percentile (or centile) is a metric that expresses the value at or below which a specified proportion of observations in a collection of observations fall. The number (or score) below which 20% of the observations may be found is called the 20th percentile, for instance.
Norm-referenced scores enable comparisons between individuals. If a test result includes a numeric value that indicates whether a student is nearly average in comparison to most other kids of a comparable age or grade, the student is substantially above average, or the student is significantly below average, the test result is norm-referenced.
To learn more about Norm-referenced scores, refer
https://brainly.com/question/14838736
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