MATH 391- Sheet 3 B- Summer 13-14.pdf - Beirut Arab University Probability and Statistics Faculty of Engineering \u2013 Tripoli Branch MATH 391 Summer 2013

# MATH 391- Sheet 3 B- Summer 13-14.pdf - Beirut Arab...

This preview shows page 1 out of 1 page.

Beirut Arab University Probability and Statistics Faculty of Engineering Tripoli Branch MATH 391 Summer 2013 14 ________________________________________________________________________________________ Sheet 3-B ( To be submitted on 21/8/2014) (Continuous Probability Distributions) Binomial Distribution 1- The finished inside diameter of a piston ring is normally distributed with a mean of 10 centimeters and a standard deviation of 0.03 centimeter. a) What proportion of rings will have inside diameters exceeding 10.075 centimeters? b) What is the probability that a piston ring will have an inside diameter between 9.97 and 10.03 centimeters? c) Below what value of inside diameter will 15% of the piston rings fall? (Answer: a) 0.0062 b) 0.6829, c) 9.969 cm) 2- The average life of a certain type of small motor is 10 years with a standard deviation of 2 years. The manufacturer replaces free all motors that fail while under guarantee. If he is willing to replace only 3% of the motors that fail, how long a guarantee should he offer? Assume that the lifetime of a

#### You've reached the end of your free preview.

Want to read the whole page?

• Summer '16
• dr fad

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern

Stuck? We have tutors online 24/7 who can help you get unstuck.
Ask Expert Tutors You can ask You can ask You can ask (will expire )
Answers in as fast as 15 minutes