1.

The standard deviation of the data is expressed by _____

A. \(s = \left\{\frac{\sum_{i=1}^n (x_i – \overline{x})^2}{n}\right\}^{1/2}\)
B. \(s = \left\{\frac{\sum_{i=1}^n (x_i – \overline{x})^2}{n-1}\right\}^{1/2}\)
C. \(s = \frac{\sum_{i=1}^n (x_i – \overline{x})^2}{n-1}\)
D. \(s = \frac{\sum_{i=1}^n (x_i – \overline{x})^2}{n}\)
Answer» C. \(s = \frac{\sum_{i=1}^n (x_i – \overline{x})^2}{n-1}\)


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