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 5,000 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 1,000 of the 5,000 residences for data on crime. (Respondents are guaranteed anonymity.) Here are the data collected for the past 12 months for one area: MONTH CRIME INCIDENCE SAMPLE SIZE CRIME RATE January 7 1,000 0.007 February 9 1,000 0.009 March 7 1,000 0.007 April 7 1,000 0.007 May 7 1,000 0.007 June 9 1,000 0.009 July 7 1,000 0.007 August 10 1,000 0.010 September 8 1,000 0.008 October 11 1,000 0.011 November 10 1,000 0.010 December 8 1,000 0.008 Determine the P¯¯¯�¯ , Sp�� , UCL and LCL for a p-chart of 95 percent confidence (at Z = 1.96). Note: Round your answers to 5 decimal places. If the next three months show crime incidences in this area as January = 10 (out of 1,000 sampled) February = 12 (out of 1,000 sampled) March = 11 (out of 1,000 sampled) What comments can you make regarding the crime rate? multiple choice The process is in control. The process is out of control.

Practical Management Science

6th Edition

ISBN:9781337406659

Author:WINSTON, Wayne L.

Publisher:WINSTON, Wayne L.

Chapter2: Introduction To Spreadsheet Modeling

Section: Chapter Questions

Problem 20P: Julie James is opening a lemonade stand. She believes the fixed cost per week of running the stand...

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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 5,000 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 1,000 of the 5,000 residences for data on crime. (Respondents are guaranteed anonymity.) Here are the data collected for the past 12 months for one area:

MONTH	CRIME INCIDENCE	SAMPLE SIZE	CRIME RATE
January	7	1,000	0.007
February	9	1,000	0.009
March	7	1,000	0.007
April	7	1,000	0.007
May	7	1,000	0.007
June	9	1,000	0.009
July	7	1,000	0.007
August	10	1,000	0.010
September	8	1,000	0.008
October	11	1,000	0.011
November	10	1,000	0.010
December	8	1,000	0.008

Determine the P¯¯¯�¯ , Sp�� , UCL and LCL for a p-chart of 95 percent confidence (at Z = 1.96).

Note: Round your answers to 5 decimal places.
If the next three months show crime incidences in this area as

January = 10 (out of 1,000 sampled)

February = 12 (out of 1,000 sampled)

March = 11 (out of 1,000 sampled)

What comments can you make regarding the crime rate?

multiple choice
- The process is in control.
- The process is out of control.

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