

\subsection{\bf 5.2\hspace{1em} Confidence Level}

\begin{slide}
\begin{itemize}
\item We prefer to define $C(\chi^2) = 1 - F(\chi^2$) which is called
the confidence level
\vspace{10pt}

\begin{tabular}{rcll}
$C(\chi^2) = 1$ & is & $\chi^2 = 0$ & ``good'' \\
$ = 0$ & is & $\chi^2 = \infty$ & ``bad'' or ``low confidence''
\end{tabular}

\item Suppose you conduct a series of experiments which gives you a
sequence of $\chi^2$ values, $\chi^2 \vert_{1,2\ldots}$.  

\begin{description}
\item{$\bullet$} An example in high energy physics would come from
analyzing a set of events each containing particle tracks---each track
would have an individual $\chi^2$.
\item{$\bullet$} A given experiment would generate many million such
$\chi^2$ values!
\end{description}
\end{itemize}
\end{slide}

