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\bf 36-303: Sampling, Surveys \& Society\\
HW01: Due Thursday Feb 7, 2008 in class
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\noindent\ul{\em Reminders:}
\begin{itemize}
\item Things to turn in:
\begin{itemize}
\item Due Today: Team Assignment I.1 (Two project proposals)
\item Due Next Tues: Team Assig. I.2 (Target pop, frame, mode)
\end{itemize}
\item Things to read:
\begin{itemize}
\item Done already: Groves Ch 1, 2
\item This week: 
\begin{itemize}
\item Groves, Ch 5
\item Groves, Ch 11 (pp 345-358)
\item Groves, Ch 4 (pp 93-102)
\end{itemize}
\end{itemize}
\item Clear, careful writing and interpretation of results is an
  important part of both weekly homeworks and the projects.  {\em I
    always expect neatly typed or neatly handwritten work.}
\item Always be judicious about including computer output and graphs:
  show enough that we can clearly see what you are doing, but not so
  much that we will get lost or bored leafing through your work!
\item Mostly homeworks will be submitted on paper in class.

\end{itemize}

\noindent\ul{\em Exercises to Turn In (there are 4 excercises):}
\begin{enumerate}

\item The Health Behavior in School-Age Children Study (HBSC) is an
  international survey conducted under the auspices of the World
  Health Organization.
\begin{enumerate}
\item Find the home page for this survey project on the web, and fill
  out, as completely as possible, a table like Tables 1.1--1.6 of the
  Groves text, for the the ``2001/02 HBSC International Report: Young
  People's Health in Context''.  You may need to use links from the
  homepage to get the information you need.
\item Please comment on any items in your table that would make it
  difficult to understand or believe the results of the survey
  (e.g. you couldn't get the information, or the information you got
  worries you in some way).  {\em If you are happy with all the information
  in your table, just say that.}
\end{enumerate}

\item {\tt HireMeNow.com}, an online temporary and contract employment
  agency, conducted a survey in 2007 to determine the reaction of
  employers to online video resumes.  Find information from online
  press releases and/or news reports about this survey, and re-do
  question \#1 (both parts!) for it.

\clearpage

\item Consider a set of $n$ trials involving independent and
identically distributed random variables $X_1, X_2,\ldots, X_n,$ where
the outcome of $1$ corresponds to success and the outcome of $0$
corresponds to failure,
and the probability of success on each trial is $p$.
\begin{enumerate}  
\item Show that $E(X_i)=p$, and $\Var(X_i)=p(1-p)$ for $i=1,2,\ldots,n$.

\item Let $Y= X_1+ X_2 +\ldots + X_n.$ Show that $E(Y)=np$, and
$\Var(Y)=np(1-p)$.

\item Let $\hat{p}=Y/n$.  Show that $E(\hat{p})=p$, and
$\Var(\hat{p})=p(1-p)/n$.
\end{enumerate}



\item {\tt
  http://www.cmu.edu/osp/regulatory-compliance/human-subjects.html}
  lists CMU IRB application forms and various training materials for
  ethical conduct of human subjects research.  Under ``Training''
  there is a link to ``NIH Online Training''.
\begin{enumerate}
\item Follow the ``NIH Online Training'' link and take the free
  training there (this will take 2 hours or less).
\item {\bf Print (or save in a file) your Certificate of Completion}
  at the end of the course.  Turn in a printed copy of your
  Certificate of Completion with this homework.\\[1.2em]
 {\em If you already
    have an active certificate of completion from a course on ethical
    treatment of human subjects in research, that you took earlier,
    you can just attach a copy of that older certificate with your hw,
    without taking the NIH training course.}
\end{enumerate}
(You can use the certificate of completion for several years, in any
future human subjects research approval process you may be involved in.)


\end{enumerate}

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