A random sample of $n_1 = 10$ regions in New England gave the following violent crime rates (per million population).
$x_1$: New England Crime Rate
3.6 3.5 3.9 4.0 3.2 4.0 1.9 4.7 3.0 3.0
Another random sample of $n_2 = 12$ regions in the Rocky Mountain states gave the following violent crime rates (per million population).
$x_2$: Rocky Mountain Crime Rate
3.6 4.4 4.4 5.4 3.2 4.7 3.6 2.5 3.2 3.4 5.1 2.7
Assume that the crime rate distribution is approximately normal in both regions.
(a) Use a calculator to calculate $\bar{x}_1$, $s_1$, $\bar{x}_2$, and $s_2$. (Round your answers to four decimal places.)
$\bar{x}_1 = $
$s_1 = $
$\bar{x}_2 = $
$s_2 = $