Results 1 to 2 of 2

Math Help - degrees of freedom and critical value

  1. #1
    Newbie
    Joined
    Apr 2012
    From
    gainesville
    Posts
    1

    degrees of freedom and critical value

    need some help figuring out some simple stats, ive been given the mean and standard deviation for 2 different samples and im having trouble finding the degrees of freedom and critical value in order to do a 2 sample T interval test
    Sample A
    n=15
    SD=5
    mean=42
    Sample B
    n=15
    SD=2
    mean=44

    how do i find the degrees of freedom and critical value? my book says "use technology to find..." but i cant seem to figure it out

    thanks!
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Junior Member
    Joined
    Mar 2012
    From
    California
    Posts
    44
    Thanks
    6

    Re: degrees of freedom and critical value

    On a TI-84 Plus scientific calculator the command is invT(.5(1+c),v) where c is the confidence level, and v is the degree of freedom. The degree of freedom (v) is n-1. invT is located in the DISTR menu on the calculator.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Degrees of Freedom in Matrix?
    Posted in the Advanced Algebra Forum
    Replies: 2
    Last Post: June 11th 2010, 09:58 AM
  2. error degrees of freedom
    Posted in the Advanced Statistics Forum
    Replies: 0
    Last Post: May 14th 2010, 05:07 PM
  3. chi square degrees of freedom
    Posted in the Advanced Statistics Forum
    Replies: 3
    Last Post: February 17th 2010, 10:28 PM
  4. Degrees of freedom
    Posted in the Advanced Statistics Forum
    Replies: 4
    Last Post: October 17th 2009, 03:54 AM
  5. P-value and Degrees of Freedom
    Posted in the Advanced Statistics Forum
    Replies: 1
    Last Post: October 28th 2008, 04:24 PM

Search Tags


/mathhelpforum @mathhelpforum