{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

exam1s11 - Statistical Methods(STAT 511 Midterm#1 Spring...

Info icon This preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
Statistical Methods (STAT 511) Midterm #1, Spring 2011 8:00-10:00pm, LWSN B155 Thursday, February 24, 2011 There are totally 27 points in the exam. The students with score higher than or equal to 25 points will receive 25 points. Please write down your name, student ID number, and mark your devision below. NAME: ID: 1
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
1. (6 points). A bag has 30 blue balls, 25 red balls, and 20 yellow balls. Randomly choose 6 of them. (a) (2 point). Compute the probability of the event that there are exactly 2 balls for each color. (b) (2 points). Compute the probability of the event that there are no yellow balls. (c) (2 points). Compute the probability of the event that there are at most two yellow balls. 2
Image of page 2
2. (6 points). Suppose A , B and C are events, and P ( A ) = 0 . 6, P ( B | A ) = 0 . 3, P ( B | A 0 ) = 0 . 4, P ( C | A B ) = 0 . 25, P ( C | A 0 B ) = 0 . 35, P ( C | A B 0 ) = 0 . 7, P ( C | A 0 B 0 ) = 0 . 55. (a) (2 points). Compute P ( A B ). (b) (2 points). Compute P ( B C 0 ). (c) (2 points). Compute P ( A | B C 0 ). 3
Image of page 3

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

{[ 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