The state and local police departments are trying to analyze crime rates so they can shift their patrols from decreasing-rate areas to areas where rates are increasing. The city and county have been geographically segmented into areas containing 5,200 residences. The police recognize that not all crimes and offenses are reported. People do not want to become involved, consider the offenses too small to report, are too embarrassed to make a police report, or do not take the time. Among other reasons. Every month, because of this, the police are contacting by phone a random sample of 1,040 of the 5,200 residences for data on crime. (Residents are guaranteed anonymity). Here are the data collected for the past 12 months for one area MONTH CRIME INCIDENCE SAMPLE SIZE CRIME RATE January 11 1,040 0 February 13 1,040 0 March 11 1,040 0 April 11 1,040 0 May 12 1,040 0 June 13 1,040 0 July 11 1,040 0 August 14 1,040 0 September 13 1,040 0 October 15 1,040 0 NOVEMBER 15 1,040 0 DECEMBER 15 1,040 0 Determine the P, Sp, UCL, AND LCL for p-chart pf 95 % confidence (at Z= 1.96). If the next 3 months show crime incidences in this area as January= (10 out of 1,040 sampled) February = 12 (out of 1,040 sampled) March = 11(out of 1,040 sampled) Is the process in control or is it out of control?
The state and local police departments are trying to analyze crime rates so they can shift their patrols from decreasing-rate areas to areas where rates are increasing. The city and county have been geographically segmented into areas containing 5,200 residences. The police recognize that not all crimes and offenses are reported. People do not want to become involved, consider the offenses too small to report, are too embarrassed to make a police report, or do not take the time. Among other reasons. Every month, because of this, the police are contacting by phone a random sample of 1,040 of the 5,200 residences for data on crime. (Residents are guaranteed anonymity). Here are the data collected for the past 12 months for one area
MONTH CRIME INCIDENCE
January 11 1,040 0
February 13 1,040 0
March 11 1,040 0
April 11 1,040 0
May 12 1,040 0
June 13 1,040 0
July 11 1,040 0
August 14 1,040 0
September 13 1,040 0
October 15 1,040 0
NOVEMBER 15 1,040 0
DECEMBER 15 1,040 0
- Determine the P, Sp, UCL, AND LCL for p-chart pf 95 % confidence (at Z= 1.96).
- If the next 3 months show crime incidences in this area as January= (10 out of 1,040 sampled)
February = 12 (out of 1,040 sampled)
March = 11(out of 1,040 sampled)
Is the process in control or is it out of control?
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