Chapter 8, Problem 8.6P

$\boxed{SOC}$ Are college students who live in dormitories significantly more involved in campus life than students who commute to campus? The following data report the average number of hours per week students devote to extracurricular activities. Is the difference between these randomly selected samples of commuter and residential students significant?

Sample 1 (Residential)	Sample 2 (Commuter)
${\bar{X}}_1=12.4$	${\bar{X}}_2=10.2$
$s_1=2.0$	$s_2=1.9$
$N_1=158$	$N_2=173$