No Title

**Figure 1:** Third Figure in Lecture 2. The same data were used as in the second figure but classes of the histogram are smaller.
$\begin{figure} \centering \setlength {\unitlength}{1 in} \begin{picture} (6,5... ...thicklines \end{picture} \setlength {\unitlength}{1 pt} \protect\end{figure}$