Alternative Equation Formats

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MathML

\begin{array}{rcl} χ_{P}^{2} & = & \sum_{j = 1}^{m} \sum_{i = 1}^{k + 1} \frac{(r_{i j} - n_{j} {\hat{π}}_{i j})^{2}}{n_{j} {\hat{π}}_{i j}} \\ χ_{D}^{2} & = & 2 \sum_{j = 1}^{m} \sum_{i = 1}^{k + 1} r_{i j} \log (\frac{r_{i j}}{n_{j} {\hat{π}}_{i j}}) \end{array}

Math Rendered as SVG

Math as LaTeX Source

\begin{eqnarray*} \chi _\mr {P}^2 & =& \sum _{j=1}^ m \sum _{i=1}^{k+1} \frac{(r_{ij} - n_ j{\widehat{\pi }}_{ij})^2}{n_ j{\widehat{\pi }}_{ij}} \\ \chi _\mr {D}^2 & =& 2 \sum _{j=1}^ m \sum _{i=1}^{k+1} r_{ij} \log \left(\frac{r_{ij}}{n_ j{\widehat{\pi }}_{ij}}\right) \end{eqnarray*}