Alternative Equation Formats

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MathML

{\hat{Q}}_{i} = (Δ {\hat{T}}_{i})^{- 1} \sum_{t = {\hat{T}}_{i - 1}^{0} + 1}^{{\hat{T}}_{i}^{0}} z_{t} z_{t}^{'}

\[ \hat{Q}_ i = (\Delta \hat{T}_ i)^{-1} \sum _{t=\hat{T}_{i-1}^0+1}^{\hat{T}_ i^0}{z_ tz_ t'} \]