**Standard Deviation for a grouped distribution**

The standard deviation for a distribution with mean , where x is an interval midpoint with frequency f, and n = ∑f , is

s = S = .

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# Standard Deviation for a grouped distribution

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**Standard Deviation for a grouped distribution**

The standard deviation for a distribution with mean , where x is an interval midpoint with frequency f, and n = ∑f , is

s = S = .