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Case Study 1: A well-known manufacturer of heavy trucks wants to determine if its manufacturing processes are in control. To do so, they determined

Case Study 1: A well-known manufacturer of heavy trucks wants to determine if its manufacturing processes are in control. To do so, they determined the daily proportion of trucks with defects to the total number of vehicles produced. Using a p-chart, determine if the process is stable (in control), if it is not, explain why.

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