If I understood your problem, you want to calculate the sum of the squared deviations from the sample. If so the formula of the St. Deviation is:
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s =√[Σ(xi - x)²/(n-1)], with n = sample size
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s² =Σ(xi - x)²/(n-1)
4² = Σ(xi - x)²/(20-1) = Σ(xi - x)²/(20-1)
16 = Σ(xi - x)²/(19)
and Σ(xi - x)² = (16).(19) = 304
hell
Step-by-step explanation:
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According to a calculator, the value of x is 4