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Bahasa Indonesia) 1:
[Salinan]Disalin!
The average of the deviation scores does not work as a measure of variability because it is always zero. Clearly, this problem results from the positive and negative values canceling each other out. The solution is to get rid of the signs ( and –). The standard procedure for accomplishing this is to square each deviation score. Using the squared values, you then compute the mean squared deviation, which is called variance.
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