Fear of Gangs. In the article “Growing Pains and Fear of Gangs” (Applied Psychology in Criminal Justice, Vol. 5, No. 2, pp. 139–164), B. Brown and W. Benedict examined the relationship between worry about a gang attack and actually being a victim of a gang attack. Interviews of a sample of high school students yielded the following contingency table. Victim Worry Yes No W1 W2 Total Yes 18 21 39 V1 No 22 152 174 V2 Total 40 173 213

a. How many of these students were victims of a gang attack?

b. How many of these students did not worry about gang attacks?

c. How many of these students who worried about gang attacks were actual victims of such an attack?

d. Describe the events W1 and (W2 &V1) in words.

e. Compute the probability of each event in part (d).