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MathML

I_{0} = \frac{(Φ^{- 1} (1 - α / 2) + Φ^{- 1} (1 - β))^{2}}{{0.4}^{2}} = \frac{(1.96 + 1.28155)^{2}}{0.16} = 65.6728

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Math as LaTeX Source

\[ I_{0} = \frac{ ( \Phi ^{-1}(1-\alpha /2) + \Phi ^{-1}(1-\beta ) )^{2} }{ {0.4}^{2} } = \frac{ (1.96 + 1.28155)^{2} }{ 0.16 } = 65.6728 \]

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