write the formula of sd with frequency
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Use this step-by-step approach to find the standard deviation for a discrete variable.
Calculate the mean.
Subtract the mean from each observation.
Square each of the resulting observations.
Add these squared results together.
Divide this total by the number of observations (variance, S2).
Use the positive square root (standard deviation, S
i cant write the formula because there is no option for the symbol so i will send image
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