Twenty-five samples of 100 items each were inspected when a process was consideredto be operating satisfactorily. In the 25 samples, a total of 135 items were found to bedefective.a. what is an estimate of the proportion defective when the process is in control?b. what is the standard error of the proportion if samples of size 100 will be used forstatistical process control?

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A: Solution: From the given information, confidence level is 0.90 and E=0.01.

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A: here given , population standard deviation  = 4.2 hour  confidence level = 99% MOE  = 0.7

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Q: Twenty-five samples of 100 items each were inspected when a process was consideredto be operating…

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Q: Question 20

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