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August 27, 2014

Homework Help: Data Management

Posted by Jamey on Sunday, January 13, 2008 at 7:05pm.

Sorry...i wrote the previous questions wrong..

The producer of HB pencils has 720 pencils randomly chosen from each day's productions. A defect rate of 15% is acceptable.
a) Assuming that 15% of all manufactured pencils are defective, what is the probability of finding at least 80 defective pencils in this sample?
b) If 120 pencils are found to be defective in today's sample, is it likely that the manufacturing process may need improvements? Explain....

If you can just give me the answer..you don't have to show me how, i Just want to see if i'm right...Thanks..

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