Question: The table below gives a breakdown of the root causes of a sample of 83 incidents. Are there significant differences in the percentage of incidents

The table below gives a breakdown of the root causes of a sample of 83 incidents. Are there significant differences in the percentage of incidents in the four cause categories? Test using Î± = .05.

For Information: Refer to the Process Safety Progress (Dec. 2004) and U.S. Chemical Safety and Hazard Investigation Board study of industrial accidents caused by management system failures, Exercise 2.146.

Management System Cause Number of Incidents 27 24 Engineering& Design Procedures & Practices Management & Oversight Training& Communication 10 Total 83

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