1. Not finding help here? Sign up for a free 30min 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!

CHI square test - finding degree of freedom

  1. Oct 6, 2014 #1
    1. The problem statement, all variables and given/known data
    i have problem of finding the degree f freedom for this question. the ans for v is 3 , but my ans is v=n-1 , where n = 6 , so my v=5...

    2. Relevant equations


    3. The attempt at a solution
     

    Attached Files:

  2. jcsd
  3. Oct 6, 2014 #2

    RUber

    User Avatar
    Homework Helper

    For the Chi Squared test, there is a minimum frequency needed for it to be accurate. I would expect that some of the less frequent observations were grouped or "binned" together to reduce your operational "n".
     
  4. Oct 6, 2014 #3

    Ray Vickson

    User Avatar
    Science Advisor
    Homework Helper


    Please type out the problem; you are not supposed to post thumbnails. (Read Vela's 'pinned' post called 'Guidelines for students and helpers', especially topic 4.) This morning I could not read your thumbnail on the medium I was using then.
     
  5. Oct 6, 2014 #4
    the question contains boxes. if i type out , it would look weird... so i would rather post the image of the original question
     
  6. Oct 6, 2014 #5

    RUber

    User Avatar
    Homework Helper

    Did combining the lower frequency observations solve your problem getting to v=3?
    I think the general rule is frequency ## \geq## 5.
     
  7. Oct 6, 2014 #6
    thanks! question solved!
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: CHI square test - finding degree of freedom
  1. Chi Squared (Replies: 1)

Loading...