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Math Help - stats: confidence interval

  1. #1
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    stats: confidence interval

    will anyone please help me with this problem??

    Assume that the paired data came from a population that is normally distributed. Construct a 95% confidence interval for the mean of all differences x y
    x_i 11 13 17 8 6 9 15 9
    y_i 6.0 10.0 14.0 5.0 11.0 7.0 14.0 13.0
    Find the 95% confidence interval

    ______ < ų_d < ________ (round to nearest decimal place as needed)
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  2. #2
    MHF Contributor matheagle's Avatar
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    Just take the difference.
    Then perform a one sample t-test on the new data, X-Y.
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