SD and Variance - Shortcut method (Derivation)
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Khan AcademyAshish Gupta
SD and Variance - Shortcut method (Derivation)
This video explains the derivation of the shortcut method, also known as the step-deviation method, for calculating variance and standard deviation. We introduce the concept of step-deviations (y sub i equals (x sub i minus A) divided by h) to simplify calculations. We'll derive the relationship between the mean of the original data and the ...
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