\documentclass[twoside]{article}
\usepackage{amsmath,amssymb,amsthm,graphicx}
\usepackage{epsfig}
\usepackage[authoryear]{natbib}

\input{stat-macros}

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\newcommand{\lecture}[4]{
   \pagestyle{myheadings}
   \thispagestyle{plain}
   \newpage
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   \framebox{
      \vbox{\vspace{2mm}
    \hbox to 6.28in { {\bf 2010 年度統計解析 \hfill Lecture Date: #3} }
       \vspace{6mm}
       \hbox to 6.28in { {\Large \hfill #1  \hfill}  }
       \vspace{6mm}
       \hbox to 6.28in { {\it Scribe: #2 \hfill Check: #4} }
      \vspace{2mm}}
   }
   \end{center}
   \markboth{#1}{#1}
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}

% Local Macros Put your favorite macros here that don't appear in
% stat-macros.tex.  We can eventually incorporate them into
% stat-macros.tex if they're of general use.

\begin{document}


\lecture{
% 以下のところを指示に従い適切に書き直してください．．
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%%%%% ここに問題番号をいれる：たとえば，「練習演習 1.20」%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
練習演習 1.20
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%   
}{%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%%%%%% 下に名前（テキスト作成者）をいれる %%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
目白花子
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}{%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%% ここにレポート出題日を入れる %%%%%%%%%%%%%%
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2010 年 4 月 22 日
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}{%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%% 下に名前（テキスト校正者）をいれる %%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
目白太郎
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
}

\section{問題}
確率変数 $ X $ は確率密度関数 
$$
  f _X ( x )
  =
  \left \{
    \begin{array}{ll}
      \dfrac{ 1 }{ 2 } ,\qquad & - 1 < x  < 1,
      \\
      0 & (\mbox{その他})
    \end{array}
  \right .
$$
を持つとする．
\begin{itemize}
\item[(i)]　$ X $ の分布関数を求め，そのグラフを描け．
\item[(ii)]　
\item[(iii)]　
\item[(iv)]　
\end{itemize}
\section{解答例}
\begin{itemize}
\item[(i)]　
\item[(ii)]　
\item[(iii)]　
\item[(iv)]　
\end{itemize}

\end{document}



