Alternative Equation Formats

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MathML

{\bar{X}}_{2} = \frac{\sum_{i = 1}^{n} ({\hat{π}}_{i} | y_{i} = 1)}{n_{0}}

$\overline{X}_2 = \frac{\sum _{i=1}^ n(\widehat{\pi }_ i | y_ i=1)}{n_0}$