Results 1 to 1 of 1

Thread: A statistical nightmare

  1. #1
    Sep 2009

    A statistical nightmare

    I need to find a sample size that will give power <.80. I am measuring effects of chemically treated limbs vs non treated limbs...same individual...actually a ratio of the two tested values. Using lab records I am trying to compare results from the past 15 years (to eliminate age bias). Any clue where to start? My data is a ration of muscle mass treated vs untreated. 10 subjects from each year...but can get more... Pasted a ver ysmall amount of data. What I want is to be able to show that, over time, the treated sides fare WORSE in mass that do untreated. So how do I use the power requirement of .8 to determine the n?
    Last edited by searcher; Sep 17th 2009 at 03:20 PM. Reason: clarification
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Perms and Combs... a nightmare!
    Posted in the Statistics Forum
    Replies: 4
    Last Post: Nov 9th 2011, 07:09 AM
  2. Integrals Nightmare
    Posted in the Calculus Forum
    Replies: 10
    Last Post: Oct 16th 2008, 09:01 AM
  3. Double Pendulum Nightmare
    Posted in the Calculus Forum
    Replies: 1
    Last Post: Sep 17th 2008, 05:10 AM
  4. nightmare integral
    Posted in the Calculus Forum
    Replies: 1
    Last Post: Apr 19th 2008, 06:05 PM
  5. foil nightmare within mods
    Posted in the Advanced Algebra Forum
    Replies: 3
    Last Post: Sep 26th 2007, 11:04 AM

Search Tags

/mathhelpforum @mathhelpforum