Chapter 8, Problem 8.14P

$\boxed{CJ}$ The mayor of a large city started a “crimeline” program some years ago and wonders whether it is working. The program publicizes unsolved violent crimes in the local media and offers cash rewards for information leading to arrests. Are “featured” crimes more likely to be cleared by arrest than other violent crimes? Results from random samples of both types of crimes are reported as follows:

Sample 1 (Crime line Crimes Cleared by Arrest)	Sample 2 (Non-Crime line Crimes Cleared by Arrest)
$P_{s1}=0.35$	$P_{s2}=0.25$
$N_1=178$	$N_2=212$