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!

Agreement of 2 values

  1. Nov 27, 2008 #1
    SOLVED:Agreement of 2 values

    This is my first post, so I hope this is the write section for it..

    How do you check if 2 values agree with eachother (I've seen it called the "comparison test", but I can't find what I'm looking for by google-ing that).

    For example, you have


    And you have to find the "ratio". The values are said to agree if R<2 and disagree if R>2


    EDIT: found the answer

    R=(x1-x2)/root(sigmax1^2 + sigmax2^2)
    Last edited: Nov 27, 2008
  2. jcsd
  3. Nov 27, 2008 #2


    User Avatar
    Science Advisor
    Homework Helper

    Welcome to PF!

    Hi Graham!

    Glad you sorted it out! :smile:

    Anyway, welcome to PF

    and here's a square-root: √ and a plus-or-minus: ± and a sigma: σ for you. :wink:
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?