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well first u need to do the Z test.. use that value that you found frm the Z-test to find your P by using the z-value chart.. You need to do the same thing for the second question, need to do the...

ATC is having nine machines which produces these slip-ring bearing. James, a quality
inspector randomly selected Machine #3 and Machine #7. A sample of 200 slip-ring
bearings selected from each...