A study of high-crime locations in Miami, Florida, was conducted. The number of crimes in each of eight sample areas throughout a one-year period was recorded. Then a neighbourhood watch program was inaugurated. The number of crimes before and after the watch are indicated in table which follows. Has there been a significant reduce in the number of crimes since the program was inaugurated? Employ the 0.01 significance level. Suppose normality.
Number of Cases by Area
A B C D E F G H
Before watch 14 7 4 5 17 12 8 9
After watch 2 7 3 6 8 13 3 5