Questão 2981691

\(\sum_{i=1}^{n} (x_i - \bar{x}) = 0\)

\(\sum_{i=1}^{n} (x_i - \bar{x})^2 = \sum_{i=1}^{n} x_i^2 - n\bar{x}^2\)

\(\sum_{i=1}^{n} (x_i - \bar{x})^2 = \sum_{i=1}^{n} x_i^2 - \frac{(\sum_{i=1}^{n} x_i)^2}{n}\)

\(\sqrt{n}S = \sqrt{\sum_{i=1}^{n} (x_i - \bar{x})^2}\)

\(nS^2 - S^2 = \sum_{i=1}^{n} (x_i - \bar{x})^2\)