Stanine (Education)

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  • Also called “standard nine” scores, they are a type of a normalized standard score. The normal distribution is divided into nine segments, with 1 representing the low end and 9 representing the high end. With the exception of scores 1 and 9, each segment represents one half of a standard deviation. For example, the middle 20% of the data are designated with a stanine score of 5. Publishers of nationally published instruments often use stanines to simplify scoring into single-numbered digits. The disadvantage of stanines is that the segments are not equal and are sample specific.

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