CJ The local police chief started a “crimeline”

program some years ago and wonders if it’s really 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

(Crimeline Crimes Cleared by Arrest)

Sample 2

(Non-crimeline Crimes Cleared by Arrest)

P s 1 = 0.35 P s 2 = 0.25 N1 = 178 N2 = 212