\item \begin{enumerate}
\item
$\,$\\
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\put(104.5,-28){\footnotesize NUMBER OF BOOKS}
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\item \begin{enumerate}
\item False. It is 12\% per book.
\item True.
\item True.
\item True.
\item False. They are discrete data. The continuity correction is needed. The endpoints are 1.5 and 3.5.
\item False. The block starts ar 10.5 books and ends at 15.5 books, so it 5 books wide. The density is 5\%/(5 books), which equals 1 percent per book.
\item False. Its density is 12\% per book, while block for 1 book has density of 29\% per book.
\end{enumerate}
\end{enumerate}
