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. Tire data on gang score and homemade weapon are summarized in the table below. 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.
GANGS
Homemade Weapon Carried | ||
Gang Classification Score | Yes | No |
0 (Never joined a gang, no close friends in a gang) | 255 | 2,551 |
1 (Never joined a gang, 1-4 close friends in a gang) | 110 | 560 |
2 (Never joined a gang, 5 or more friends in a gang) | 151 | 636 |
3 (Inactive gang member) | 271 | 959 |
4 (Active gang member, no position of rank) | 175 | 513 |
5 (Active gang member, holds position of rank) | 476 | 831 |
Source: Knox, G. W.,ct al.“A gang classification system for corrections,” Journal of Gang Research, Vol. 4, No. 2, Winter 1997, p. 54 (Table 4).
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