

\subsection{\bf Example of Multiple Moments}

\begin{slide}
\begin{itemize}
\item This idea is important in the method of moments when one
calculates several moments from the same distribution of events.  

\item In fact, one usually drops (forgets) off diagonal terms in {\bf
M} and forms $\chi^2$ from non-independent random variables.

\item This is done in high energy physics when fitting the moments
$\rho_{00}$, $\rho_{1-1}$, $\rho_{10}$ of a spin $1^-$ particle decay.

\item Of course, in this case, the off-diagonal elements are never
given by the experimentalist recording his or her data: so one is
forced to set them zero.
\end{itemize}
\end{slide}

