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Math Help - Estimating with confidence

  1. #1
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    Estimating with confidence

    How do you solve (a)? how do i get the mean and standard deviation from the confidence interval?
    Attached Thumbnails Attached Thumbnails Estimating with confidence-screen-shot-2013-02-05-8.46.06-pm.png  
    Last edited by asilvester635; February 5th 2013 at 10:07 PM.
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  2. #2
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    Re: Estimating with confidence

    Hey asilvester635.

    Hint: Consider if you are getting an interval for the mean and what the interval is in terms of the test statistic (Think t-distribution or Normal distribution).
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  3. #3
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    Re: Estimating with confidence

    thank you so much
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