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Stanine Score stands for "standard nine" score.
A stanine score, stands for "standard nine" score, is a way to scale test scores on a nine point standard scale.
It can be used to convert any test score to a single digit score. Like z-scores and T-scores, stanines are a way to assign a number to a member of a group, relative to all members in that group. However, while z-scores and T-scores can be expressed with decimals like 1.2 or 3.25, stanines are always positive whole numbers from 1 to 9.
Stanines are similar to normal distributions. We can think of these scores as a bell curve that has been sliced up into 9 pieces. These pieces are numbered 1 through 9, starting at the left hand section. However, where a standard normal distribution has a mean of 0 and standard deviation of 1, stanines have a mean of 5 and a standard deviation of 2.
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