Chapter 7-9 Numbers, Percentages, and Statistics Review
Call Kai
Learn
Practice Test
Spaced Repetition
Match
Flashcards
Knowt Play1/104
There's no tags or description
Looks like no tags are added yet.
105 Terms
Q: What percentage of sworn officers work in crime-prevention units?
A: 3%. About
Q: What percentage of violent crimes are reported to police?
A: 51%. About
Q: What percentage of property crimes are reported to police?
A: 39%. About
Q: In the Chicago study, what percentage of calls did citizens view as crimes?
A: 58%.
Q: In the Chicago study, what percentage were actually crimes?
A: 17%.
Q: Approximately what percentage of sworn officers are detectives?
A: 15%. About
Q: In what percentage of departments is detective a separate rank?
A: 40%. About
Q: What percentage of arrests are made by patrol officers?
A: 80%. About
Q: Approximately how often do officers make arrests when they could?
A: 50% About of the time.
Q: What percentage of people comply when simply told to stop?
A: 80%. About
Q: In what percentage of burglaries and robberies are routine activities performed?
A: 90%. About
Q: How accurate are case-solvability factors?
A: 67%–93%.
Q: What percentage of Index Crimes are cleared annually?
A: 21%. About
Q: What percentage of LAPD cases were cleared when a suspect was named?
A: 86%.
Q: What percentage were cleared when no suspect was named?
A: 12%.
Q: What percentage of detectives generate more than half of conviction-producing arrests?
A: 15%. About
Q: Eyewitness misidentification contributed to what percentage of wrongful convictions?
A: 72%.
Q: When was the first U.S. crime lab established?
A: 1923.
Q: How long does CODIS matching usually take?
A: 3–7 days.
Q: DNA plus traditional investigation is how much more likely to lead to arrest?
A: Twice as likely.
Q: When was the War on Drugs declared?
A: 1971.
Q: How much is spent yearly on drug enforcement?
A: $9 billion.
Q: How much is spent on treatment?
A: $4 billion.
Q: How much is spent on education?
A: $1.5 billion.
Q: When was DARE established?
A: 1983.
Q: How many classroom sessions did DARE traditionally involve?
A: 17.
Q: What percentage of school districts adopted DARE?
A: 75%.
Q: About how many active gang members exist in the U.S.?
A: 1.4 million.
Q: About how many gangs exist?
A: More than 33,000.
Q: What percentage of major cities report gang activity?
A: 86%.
Q: What percentage of larger departments have gang units?
A: About one-third.
Q: What percentage of homicides involve guns?
A: 71%.
Q: What percentage of robberies involve guns?
A: 25%.
Q: What percentage of assaults involve guns?
A: 5%.
Q: When was the Kansas City Gun Experiment conducted?
A: 1993.
Q: What reduction in gun crime occurred?
A: 47%.
Q: What percentage of terrorism incidents are domestic?
A: 80%.
Q: What was the worst terrorist attack on U.S. soil?
A: September 11, 2001.
Q: How many different officer behaviors were identified in an NYPD study?
A: 20.
Q: In what percentage of cases did citizens comply with police orders?
A: 80%.
Q: About how many traffic contacts do police make annually?
A: 24 Approximately million.
Q: What percentage of motorists believe they were stopped for a legitimate reason?
A: 85%. About
Q: What percentage of police deaths have been traffic-related since 1998?
A: 13%. Approximately
Q: What percentage of police assaults have been traffic-related since 1998?
A: 9.4%. Approximately
Q: What percentage of drivers are estimated to be drunk on an average weeknight?
A: 5%. About
Q: What percentage of domestic disturbances involve violence?
A: 33%.
Q: How many domestic violence incidents occurred in 2010 according to the NCVS?
A: 509,230.
Q: What percentage of wives experienced domestic violence?
A: 13%.
Q: What portion of domestic violence against wives involved severe violence?
A: One-third.
Q: How did domestic violence rates change between 1993 and 2010?
A: 50%. They about by decreased
Q: What percentage of female victims report domestic violence?
A: 62%.
Q: What percentage of victims think domestic violence is not important enough for police involvement?
A: 4%.
Q: What percentage fear reprisal?
A: 3.4%.
Q: What percentage avoid reporting to protect the offender?
A: 2.9%.
Q: How often is a domestic violence victim battered on average?
A: Three per times year.
Q: What percentage of all violent crime was domestic violence between 2003 and 2012?
A: 21%.
Q: What percentage of victims are female?
A: 76%.
Q: What percentage of victims are male?
A: 24%.
Q: Historically, how common was arrest in domestic violence incidents?
A: 12% 40%. About to
Q: What repeat-violence rate occurred among arrested offenders?
A: 10%.
Q: What repeat-violence rate occurred among offenders who received mediation?
A: 19%.
Q: What percentage of departments had arrest-preferred policies by 1986?
A: 46%.
Q: What percentage of departments now have written domestic violence policies?
A: 99%.
Q: What percentage of departments have specialized domestic violence units?
A: 46%.
Q: How many states have mandatory-arrest laws?
A: 22.
Q: How many states have arrest-preferred laws?
A: 6.
Q: How many states rely primarily on officer discretion?
A: 11.
Q: Approximately how many full-time prostitutes work in the United States?
A: 250,000. About
Q: About how many customers are served weekly?
A: 1.5 Approximately million.
Q: What percentage of adult males are estimated to hire a prostitute over a 2–5 year period?
A: 2–3%.
Q: How much money does prostitution generate annually?
A: $7–9 billion.
Q: What estimate did HUD provide for the homeless population?
A: Approximately 640,000.
Q: What percentage of police departments view homelessness as a moderate or major problem?
A: 70%.
Q: What percentage of police contacts involve mentally ill individuals?
A: 7–10%.
Q: What percentage of mentally ill calls come from family members?
A: 32%.
Q: What percentage of mentally ill encounters involved a weapon when police arrived?
A: About one-half.
Q: How often was property damage involved in mentally ill encounters?
A: 33% of the time.
Q: What percentage of mentally ill encounters end with informal disposition?
A: 75%.
Q: According to the FBI, how many officers contracted HIV through job exposure from 1981–1991?
A: Seven.
Q: What percentage of departments were required to provide HIV-related training?
A: About one-half.
Q: What percentage of violent index-crime arrests involve juveniles?
A: 16%.
Q: What percentage of property-crime arrests involve juveniles?
A: 26%.
Q: What percentage of arson arrests involve juveniles?
A: 43%.
Q: What percentage of vandalism arrests involve juveniles?
A: 37%.
Q: What percentage of large departments have specialized juvenile units?
A: About 50%.
Q: What percentage of juvenile contacts begin with a citizen call?
A: 72%.
Q: What percentage begin through officer street contact?
A: 28%.
Q: What percentage of juveniles are released to parents?
A: 25–30%.
Q: What percentage of arrested juveniles are referred to juvenile court?
A: 71%.
Q: What percentage of local police officers work in patrol?
A: 65%. Approximately
Q: What percentage of police personnel conduct criminal investigations?
A: 16%. Approximately
Q: What was the 2018 national police-population ratio?
A: 1,000 2.5 officers per population.
Q: What is the normal supervisory span of control?
A: (1:8). One eight every for officers supervisor
Q: What percentage of departments use one-officer patrol cars?
A: 89%. Approximately
Q: Where and when was the first 911 system created?
A: 1968. Alabama, Haleyville, in
Q: What percentage of calls typically receive a police response?
A: 50%. About
Q: What percentage of calls are referred to other agencies?
A: 17%. About
Q: What was the most important finding of the Call Service Workload Study?
A: 20-30% Only and calls crime fighting, involve maintenance. most of order service while
Q: How many police departments were studied?
A: 24 departments.
Q: How many metropolitan areas were included?
A: Three areas. metropolitan