Chapter 8, Problem 8.4P

$\boxed{PA}$ A number of years ago, the road and highway maintenance department of Sin City. Nevada, began recruiting minority group members through an affirmative action program. In terms of efficiency ratings, as compiled by their superiors, how do the affirmative action employees rate? The ratings of random samples of both groups were collected, and the results are reported here (higher ratings indicate greater efficiency) Write a few sentences reporting and interpreting the results of the test.

a.

Sample 1 (Affirmative Action)	Sample 2 (Regular)
${\bar{X}}_1=15.2$	${\bar{X}}_2=15.5$
$s_1=3.9$	$s_2=2.0$
$N_1=97$	$N_2=100$