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standard deviations  

Definición

  • Standard deviation (SD) is the average distance of each score in a distribution from the mean. It is calculated by squaring the difference between each score and the mean, averaging those squared differences, and taking the square root of that average. [Source: Encyclopedia of School Psychology; Standard Deviation]

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http://data.loterre.fr/ark:/67375/N9J-RW069KMH-P

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