Chapter 8.4, Problem 61E

To determine

To calculate: The mean, and the standard deviation of the population for the year $2000$ and $2010$ where the list showing the percentage of aging population (residents of age $65$ and older) in $50$ states for the year $1990,2000$ and $2010$.

$1990:$

$\begin{array}{c}4,9,10,10,10,10,10,11,11,11,11,11,11,\\ 11,11,12,12,12,12,12,12,13,13,13,13,13,\\ 13,13,13,13,13,13,13,13,13,14,14,14,14,\\ 14,14,14,14,15,15,15,15,15,15,18\end{array}$

$2000:$

$\begin{array}{l}6,9,10,10,10,11,11,11,11,11,11,11,12,\\ 12,12,12,12,12,12,12,12,12,12,13,13,13,\\ 13,13,13,13,13,13,13,13,13,13,13,14,14,\\ 14,14,14,14,14,15,15,15,15,16,18\end{array}$

$2010:$

$\begin{array}{l}8,9,10,11,11,11,12,12,12,12,12,12,12,\\ 13,13,13,13,13,13,13,13,13,14,14,14,14,\\ 14,14,14,14,14,14,14,14,14,14,14,14,14,\\ 14,14,14,15,15,15,15,15,16,16,17\end{array}$