During the past year, the police department has collected data at 1,000 intersections. The data were compiled

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During the past year, the police department has collected data at 1,000 intersections.

The data were compiled on a monthly basis as shown below:

a. Construct a p -chart based on the above data.

b. Should the system be modified if, during the next 3 months, reports of congestion at these 1,000 intersections indicate the following:

Month Congestion Incidence January 15 February 9 March 11

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