2710 005 FINAL A FALL 10 SOLUTIONS

Let x be a random variable with a normal distribution

This preview shows 3 out of 6 pages.

5. Let  be a random variable with a normal distribution having a mean of 30 and a  standard deviation of 8.  What is P( <20)? A. .3944 B. .1056*
Image of page 3

Subscribe to view the full document.

C. .6056 D. .8944 6. Given a t = 2.518; with n = 22; what area do you expect to be to the right of this t  value? 7. Desktop surface defects have been counted on a sample of 12 new desks ready  for shipment to the new UNT College of Business building.  The results of  inspection yield the following results: Desk 1 2 3 4 5 6 7 8 9 10 11 12 Defect0 0 1 2 0 0 1 0 4 1 0 2 For the appropriate control chart; what is the  Lower control limit ? 8. Referring to the data in #7 above, the process is: A. In Control B. Out of Control* 9. With a new football stadium being almost finished, UNT is considering pricing  changes for “Premium Seating” season tickets.  They take a sample of 25 season ticket  holders from a population that is normally distributed and has a known standard  deviation of $90.  They find the mean of this sample to be $200. The Upper Confidence  Limit for the ticket price at the 90% level is?
Image of page 4
10. Using the data in Question #9 above, what should the maximum sample size to  be taken if the ticket manager says that a maximum error of $10 is desired at the  90% confidence level.  Round up to the nearest whole number. A.    81 B.  149 C.  193 D.  220* 11. At UNT, 85% of the students are U.S. citizens; and 20% of all the students are  married. Also 34% of the students that are married are non-U.S. citizens. Given the  student is not married, what is the probability that the student is a U.S. citizen?
Image of page 5

Subscribe to view the full document.

Image of page 6
You've reached the end of this preview.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    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.

    Student Picture

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

  • Left Quote Icon

    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.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    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.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern