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!

What formula is this?

  1. Jan 24, 2007 #1
    great forum, been looking at some past papers and saw this formula in a stats paper - don't know what it is. i want to know as it is used to calculate a question. please help...
    its put up as an attachment...


    t = x1 - x2 / s (√ 1/n1 + 1/n2)

    the x's are x bar

    thanks in advance...

    Attached Files:

    • form.bmp
      File size:
      79.4 KB
    Last edited: Jan 24, 2007
  2. jcsd
  3. Jan 25, 2007 #2
    Looked familiar, so I glanced around; it looks like the two-mean hypothesis test, where s_1 = s_2
    (i.e. the formula I found for the two-mean hypothesis test was the same as yours, except the s was under the square root as s_1 and s_2 squared.)
    http://www.duxbury.com/statistics_d/templates/student_resources/0534377556_woodbury/artfinal/Formulas/Formula%205.jpg [Broken]
    Last edited by a moderator: May 2, 2017
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: What formula is this?
  1. What is this formula? (Replies: 5)