Alternative Equation Formats

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MathML

{\bar{y}}_{k} = \frac{1}{N_{k}} \sum_{j = 1}^{N_{k}} y_{k j}

{\bar{y}}_{k} = \frac{1}{N_{k}} \sum_{j = 1}^{N_{k}} y_{k j}

\[ {\overline{y}}_{k} = \frac{1}{N_{k}} \sum _{j=1}^{N_{k}} {{y}_{kj}} \]