Gangs and homemade weapons. The National Gang Crime Research Center (NGCRC) has developed...

Gangs and homemade weapons. The National Gang Crime Research Center (NGCRC) has developed a six-level gang classification system for both adults and juveniles. The six categories are shown in the accompanying table. The classification system was developed as a potential predictor of a gang member’s propensity for violence in prison, jail, or a correctional facility. To test the system, the NGCRC collected data on approximately 10,000 confined offenders and assigned each a score from the gang classification system. (Journal of Gang Research , Winter 1997). One of several other variables measured by the NGCRC was whether or not the offender had ever carried a homemade weapon (e.g., knife) while in custody. The data on gang score and homemade weapon are summarized in the table below and saved in the GANGS file. Conduct a test to determine whether carrying a homemade weapon in custody depends on gang classification score. (Use α = .01.) Support your conclusion with a graph.

Source: From Knox, G. W., et al. “A gang classification system for corrections.” Journal of Gang Research, Vol. 4, No. 2, Winter 1997,. Reprinted with permission from National Gang Crime Research Center.

Reproduction of Part of Table V in Appendix A