Alternative Equation Formats

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MathML

χ^{2} = \frac{\sum_{j} (n_{j} - n / m)}{n / m}

χ^{2} = \frac{\sum_{j} (n_{j} - n / m)}{n / m}

\[ \chi ^{2} = \frac{\sum _ j(n_ j - n/m)}{n/m} \]