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If the standard deviations <math>\sigma_{int\_j,i} </math> for the single observations are | If the standard deviations <math>\sigma_{int\_j,i} </math> for the single observations are used for weighting, <math>s^2_{y}</math> is obtained from | ||
<math>\overline{x}_{i_w} = \frac{\sum^n_{j} w_{j,i} x_{j,i}} {\sum^n_{j}w_{j,i}}</math>: | <math>\overline{x}_{i_w} = \frac{\sum^n_{j} w_{j,i} x_{j,i}} {\sum^n_{j}w_{j,i}}</math>: | ||