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{\it Software Engineering} (CSE-304)  11 June 2001\\
\noindent
Name [ \hspace{2in} ] \hspace{.1in} Student-ID [ \hspace{1in} ]\\

\noindent
\begin{itemize}
\item[1.] In the initial release of a product, 
$KCSI=KSSI=100 KLOC$ and $Defects/KCSI=2.0$,
while in the 2nd release of the product, 
$KCSI=20KLOC$ and $Defects/KCSI=1.6$.
Assuming $KCSI=40$ in the 3rd release, answer the following questions.
   \begin{itemize}
   \item[(1)]How much is the percentage of the improvement in 
             $Defects/KCSI$ from the 1st release to the 2nd?
   \item[]
   \item[]
   \item[]
   \item[]\hspace*{1in}\hfill Ans.(\hspace{1in})
   \item[(2)]What is the total number of additional defects 
             in the 2nd release?
   \item[]
   \item[]
   \item[]
   \item[]\hspace*{1in}\hfill Ans.(\hspace{1in})
   \item[(3)]So, how much percentage of the absolute number of defect 
             reduction do customers experience?
   \item[]
   \item[]
   \item[]
   \item[]\hspace*{1in}\hfill Ans.(\hspace{1in})
   \item[(4)]The goal for $Defects/KCSI$ in the 3rd release should be less 
             than the value obtained in (1) from the developer's point of 
             view, but what about from the customer's point of view? 
             Answer, how many should be the absolute target value of 
             $Defects$ in the 3rd release both from developer's and 
             customer's point of view.
   \item[]
   \item[]
   \item[]
   \item[]\hspace*{1in}\hfill Ans.(from d.~point of view: \hspace{1in})
   \item[]\hspace*{1in}\hfill Ans.(from c.~point of view: \hspace{1in})
   \end{itemize}
\item[2.] About the hypothetical survey bellow, answer the following 
          question.
\begin{table}[hbtp]
\begin{center}
\begin{tabular}{c c c c c c c c}    \\ \hline \hline 
                   & R     & U    & A    & I    & M    & P    & D   \\ 
\hline
Satisfaction level & 0.9   & 0.8  & 0.9  & 0.7  & 0.8  & 0.7  & 0.9 \\
Logistic Regression coefficient
                   & 1.2   & 0.7  & 0.4  & 0.4  & 0.4  & 0.2  & 0.2 \\ 
Odds ratio         & 7.4   & 4.1  & 2.6  & 2.3  & 2.1  & 1.9  & 1.4 \\ 
\hline\hline
\end{tabular} 
\end{center}
\end{table}
   \begin{itemize}
   \item[(1)]Re-order RUAIMPD according to the priority to be improved.
   \item[]   
   \item[]   
   \item[]   
   \item[]\hspace*{1in}\hfill Ans.(\hspace{1in})
   \item[(2)]Which attributes are negative for the overall satisfaction?  
   \item[]   
   \item[]   
   \item[]   
   \item[]\hspace*{1in}\hfill Ans.(\hspace{1in})
   \end{itemize}
\clearpage
\item[3.] In applying a model to analyze defect arrival vs time,
          the testing effort should be homogeneous throughout the testing 
          phase. Assuming the effort during the 4 day of testing was as 
          the table bellow, how many person-hour per day should the number 
          of defects be re-allocate on?
\begin{table}[hbtp]
\begin{center}
\begin{tabular}{c c c c c}     \\ \hline \hline 
day    & 1st & 2nd & 3rd & 4th \\ \hline
person & 10  & 5   & 4   & 10  \\
hour   & 8   & 8   & 4   & 16  \\
defect & 15  & 7   & 2   & 38  \\ \hline\hline
\end{tabular} 
\end{center}
\end{table}
\item[]
\item[]
\item[]
\item[]
\item[]\hspace*{1in}\hfill Ans.(\hspace{1in})
\item[4.] We now want to pick up a sample out of a total population of 
          10,000 customers to learn their satisfaction level.
   \begin{itemize}
   \item[(1)] How large is a sample sufficient under the following 
              condition? Random sampling with 90\% confidence, 
              5\% margin of error, and estimated satisfaction level is 50\%.
   \item[]
   \item[]
   \item[]
   \item[]
   \item[]\hspace*{1in}\hfill Ans.(\hspace{1in})
   \item[(2)] When we employ {\it stratified sampling} according to the age 
              group, with statistics of each of the group being as follows.
              If we are to pick up a total of 1,000 customers, how large
              should be the size of each stratum?
\begin{table}[hbtp]
\begin{center}
\begin{tabular}{c c c c c}     \\ \hline \hline 
age $x$   & $x<15$ & $15\le x<20$ & $20\le x<30$ & $x \ge 30$ \\ \hline
population                & 1,000 & 4,000 & 3,000 & 2000      \\ 
mean of $x$               & 14    & 25     & 32     & 40      \\
standard deviation of $x$ & 1     & 2      & 2      & 5       \\
\hline\hline
\end{tabular} 
\end{center}
\end{table} 
   \item[]
   \item[]
   \item[]
   \item[]
\begin{table}[hbtp]
\begin{center}
\begin{tabular}{c c c c c c c}
\hspace*{2in}&Ans.& age $x$ & $x<15$ & $15\le x<20$ & $20\le x<30$ & 
                                                            $x \ge30$\\ 
&& number of sample &(\hspace{.5in})&(\hspace{.5in})&(\hspace{.5in})
&(\hspace{.5in})\\ 
\end{tabular} 
\end{center}
\end{table} 
   \end{itemize}
\end{itemize}
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