Results 1 to 2 of 2

Math Help - Verification for Solve of Zobt Please

  1. #1
    Newbie
    Joined
    Jan 2013
    From
    Louisiana
    Posts
    1

    Post Solved Please Ignore. Thank you.

    This is a pretty straightforward problem but I am still learning. Please take a quick look and see if this was done correctly. Thank you.Problem: The producers of a new toothpaste claim that it prevents more cavities than other brands of toothpaste. A random sample of 60 people used the new toothpaste for six months. The mean number of cavities at their next checkup is 1.5. In the general population, the mean number of cavities at 6-month check-up is 1.73 (σ = 1.12). Solutionz_obt= (M-μ)/σ-M = (1.5-1.73)/1.12= -0.205Thank you.
    Last edited by Gentleman019; January 11th 2013 at 04:26 PM.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    Joined
    Sep 2012
    From
    Australia
    Posts
    3,664
    Thanks
    606

    Re: Verification for Solve of Zobt Please

    Hey Gentleman019.

    What is the standard deviation or standard error of the new cavity trial sample? Are they the same? (ie 1.12 for both sigma or standard errors)?

    Your test statistic is not correct: You need to take into account the number of samples as well as both standard errors or standard deviations.

    Do you know the formula to calculate a test statistic for a two sample t-test?
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Verification?
    Posted in the Advanced Algebra Forum
    Replies: 4
    Last Post: October 6th 2011, 05:48 PM
  2. verification needed
    Posted in the Algebra Forum
    Replies: 1
    Last Post: August 15th 2009, 01:32 AM
  3. Verification!
    Posted in the Pre-Calculus Forum
    Replies: 0
    Last Post: April 21st 2009, 02:23 PM
  4. Integral verification
    Posted in the Calculus Forum
    Replies: 1
    Last Post: September 1st 2008, 02:19 AM
  5. verification on formula
    Posted in the Advanced Statistics Forum
    Replies: 1
    Last Post: May 29th 2008, 10:15 PM

Search Tags


/mathhelpforum @mathhelpforum