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For the Student t variable T defined above,
\begin{equation*} \mu = 0 \end{equation*}
and if r>2
\begin{equation*} \sigma^2 = \frac{r}{r-2} \end{equation*}
and if r>3
\begin{equation*} \gamma_1 = 0 \end{equation*}
and if r>4
\begin{equation*} \gamma_2 = \frac{6}{r-4} + 3. \end{equation*}
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