Suppose a Police Department Wants to Evaluate the Effectiveness of a Neighborhood

Suppose a police department wants to evaluate the effectiveness of a neighborhood foot patrol program in reducing the incidence of crime.Which design would be most suitable to use in order to conclude whether or not the program reduces the rates of crime?

A) control time series design
B) pretest-posttest design
C) nonequivalent control group design
D) posttest only with nonequivalent control groups design