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Homework Help: ANOVA confidence interval

  1. Sep 6, 2011 #1
    1. The problem statement, all variables and given/known data

    There's no need to write out the full question, but basically we have 6 diets, and for each one a list of the levels of protein in 10 independant samples for each. Sample mean and standard deviation given.

    Calculate and interpret a confidence interval centered on the sample mean for diet one.

    2. Relevant equations

    3. The attempt at a solution

    The sample mean for diet 1 is 100, SD is 15.1

    When it says a confidence interval centered on this, do i just calculate

    100+-t*(15.1)/root(10) where t* is the critical value obtained using a t distribution with n-1 = 9 degrees of freedom?
  2. jcsd
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