\documentclass[12pt]{article}\usepackage{ammaths}\en

\begin{document}

\module{LOST}{01}{04}{1 period}

\prereq{Basic notions about statistics : scatterplot, average, median \dots}

\object{\begin{itemize}
        \item Use a spreadsheet to study statistical data.
	\end{itemize}}

\mater{\begin{itemize}
	\item Task sheets.
	\item Computers.
	\end{itemize}}

\modpart{Computer work and analysis of statistical data}{55 mins}

Students are given a task sheet with some statistical data about the TV show Lost, and a few questions about these data.
They have to use a spreadsheet to analyse the data and answer the questions.





\pagebreak

\moddocdis{LOST}{01}{04}{Task sheet}

Lost is an American serial drama television series. It follows the lives of plane crash survivors on a mysterious
tropical island, after a commercial passenger jet flying between Sydney, Australia and Los Angeles, United States
crashes somewhere in the South Pacific. The pilot episode was first broadcast on September 22, 2004, and since then six
full seasons have aired. In this exercise we will study only the first four seasons. 

Season one featured 25 episodes, season two 23 episodes,  season three 22 episodes, and season four only 13 episodes,
due to the 2007-2008 Writers Guild of America strike. The ratings of these episodes are shown in the tables below, with
the numbers of viewers in million.

\begin{center}
{\bf Season 1}

\medskip

\begin{tabular}{|c|c|c|c|c|c|c|c|c|c|c|c|c|}
\hline
Episode & 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 & 9 & 10 & 11 & 12 \\
\hline
Viewers & 18.6 & 17 & 16.5 & 18.2 & 16.8 & 16.8 & 18.7 & 18.4 & 17.6 & 17.2 & 18.9 & 21.6 \\
\hline
Episode & 13 & 14 & 15 & 16 & 17 & 18 & 19 & 20 & 21 & 22 & 23 & 24 \\
\hline
Viewers & 20.8 & 19.7 & 19.5 & 17.9 & 19.5 & 18.9 & 17.8 & 17.1 & 17.2 & 17.1 & 18.6 & 20.7 \\
\hline
\end{tabular}


{\bf Season 2}

\medskip

\begin{tabular}{|c|c|c|c|c|c|c|c|c|c|c|c|c|}
\hline
Episode & 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 & 9 & 10 & 11 & 12 \\
\hline
Viewers & 23.5 & 23.2 & 22.4 & 21.7 & 21.4 & 20 & 21.9 & 19.3 & 21.5 & 20.6 & 19.1 & 19.1 \\
\hline
Episode & 13 & 14 & 15 & 16 & 17 & 18 & 19 & 20 & 21 & 22 & 23 & \multicolumn{1}{c}{}  \\
\cline{1-12}
Viewers & 18.7 & 18.2 & 16.4 & 15.3 & 16.2 & 16.4 & 15.7 & 15.6 & 16.4 & 14.7 & 17.8 &  \multicolumn{1}{c}{}\\
\cline{1-12}
\end{tabular}

\bigskip

{\bf Season 3}

\medskip

\begin{tabular}{|c|c|c|c|c|c|c|c|c|c|c|c|}
\hline
Episode & 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 & 9 & 10 & 11  \\
\hline
Viewers & 18.8 & 16.9 & 16.3 & 17.1 & 16.1 & 17.1 & 14.5 & 12.8 & 13.0 & 12.8 & 12.5 \\
\hline
Episode & 12 & 13 & 14 & 15 & 16 & 17 & 18 & 19 & 20 & 21 & 22 \\
\hline
Viewers & 12.5 & 12.2 & 11.5 & 11.7 & 12.1 & 12.1 & 11.9 & 12.3 & 12.1 & 12.3 & 13.9 \\
\hline
\end{tabular}

\bigskip

{\bf Season 4}

\medskip

\begin{tabular}{|c|c|c|c|c|c|c|c|c|c|c|c|c|c|}
\hline
Episode & 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 & 9 & 10 & 11 & 12 & 13  \\
\hline
Viewers & 17.8 & 17.0 & 15.6 & 15.4 & 15 & 14.9 & 13.8 & 13.4 & 14.1 & 12.9 & 13 & 13.1 & 14 \\
\hline
\end{tabular}

\end{center}

\begin{flushright}
{\sl Source : http://en.wikipedia.org}
\end{flushright}

\begin{enumerate}
\item Open a blank spreadsheet (using MS Excel or OpenOffice Calc).
\item Enter the data in four separate columns.
\item Use the ``graphics'' tool to represent each set of data (each season) by a different scatter plot.
\item Use the ``functions'' tool to compute, in four cells below each set of data, the mean, the median and the two quartiles.
\item Use all these tools and values to compare the four seasons. Which season was the most successfull, which one pleased - and kept - its viewers the most ? The answer should be detailed, motivated and nuanced.
\end{enumerate}


\end{document}
