Aging Exercises $61-68$ are based on the following list, which shows the percentage of aging population (residents of age 65 and older) in each of the 50 states in $1990,2000,$ and $2010:^{56}$
$\mathbf{1990}$
$$
\begin{array}{r}
4,9,10,10,10,10,10,11,11,11,11,11,11, \\
11,11,12,12,12,12,12,12,13,13,13,13,13, \\
13,13,13,13,13,13,13,13,13,14,14,14,14, \\
14,14,14,14,15,15,15,15,15,15,18
\end{array}
$$
$\mathbf{2 0 0 0}$
$$
\begin{array}{r}
6,9,10,10,10,11,11,11,11,11,11,11,12, \\
12,12,12,12,12,12,12,12,12,12,13,13,13, \\
13,13,13,13,13,13,13,13,13,13,13,14,14 \\
14,14,14,14,14,15,15,15,15,16,18
\end{array}
$$
$$
\begin{aligned}
&\mathbf{2 0 1 0}\\
&\begin{array}{r}
8,9,10,11,11,11,12,12,12,12,12,12,12, \\
13,13,13,13,13,13,13,13,13,14,14,14,14, \\
14,14,14,14,14,14,14,14,14,14,14,14,14, \\
14,14,14,15,15,15,15,15,16,16,17
\end{array}
\end{aligned}
$$
The answer to Exercise 61 suggests that the 2010 population was:
(A) older on average and more diverse with respect to age
(B) older on average and less diverse with respect to age
(C) younger on average and more diverse with respect to age
(D) younger on average and less diverse with respect to age than the 2000 population.
Random Variables and Statistics
Measures of Dispersion