1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: One More Prob. Question

  1. Apr 24, 2006 #1
    Many skipped classes: GPA < 2 = 80 people, GPA between 2 and 3 = 25 people, GPA > 3 = 5 people

    Few skipped classes: GPA < 2 = 175 people, GPA between 2 and 3 = 450 people, GPA > 3 = 265

    Are "GPA between 2 and 3" and "skipped few classes" independent?
    A. No, b/c .475 does not equal .506
    B. No, b/c .475 does not equal .89
    C. No, b/c .450 does not equal .475
    D. Yes, because of conditional probabilities
    E. Yes, because of the product rule

    I know that they are independent if P(A n B) = P(A) * P(B)
    .45 = .475 * .89
    No it does not, .45 does not equal .42275
     
  2. jcsd
  3. May 1, 2006 #2

    Tom Mattson

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    That's what I get too.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook




Loading...
Similar Threads for More Prob Question Date
Prove sin(x)<x and more Aug 26, 2017
Complex Plane Aug 22, 2017
More to less quantity Nov 29, 2016
One more Linear Transformation Dec 3, 2015
Complex numbers: show that (a^b)^c has more values than a^(bc) Dec 30, 2013