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Please answer the following: A shipment of 450 new blood pressure monitors have arrived. Tests are done on 75 of the new monitors and it

Please answer the following:

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A shipment of 450 new blood pressure monitors have arrived. Tests are done on 75 of the new monitors and it is found that 15 of the 75 give incorrect blood pressure readings. Find the 80% confidence interval for the proportion of all the monitors that give incorrect readings. Answer the following questions: 1. Multiple choice: Which equation would you use to solve this problem? A. X- Z

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