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Math Help - Confidence limits

  1. #1
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    Confidence limits

    In a tutorial I am given the standard deviation of bolts(over a long period of time), the mean diameter of a 200 bolts sample and that in one day the machine produces 6000 bolts.

    stdev = 0.013cm
    sample= 200 bolts
    mean dia = 0.455cm
    6000 bolts/day

    then I am asked to determine ex the 96% confidence limits and the 99% confidence limits for an estimate of the mean diameter of all bolts produced in one day.

    If someone can give a brief explanation or some links on the matter, it would be really appreciated.


    Brandon
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  2. #2
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    Quote Originally Posted by trojsi View Post
    In a tutorial I am given the standard deviation of bolts(over a long period of time), the mean diameter of a 200 bolts sample and that in one day the machine produces 6000 bolts.

    stdev = 0.013cm
    sample= 200 bolts
    mean dia = 0.455cm
    6000 bolts/day

    then I am asked to determine ex the 96% confidence limits and the 99% confidence limits for an estimate of the mean diameter of all bolts produced in one day.

    If someone can give a brief explanation or some links on the matter, it would be really appreciated.


    Brandon
    Don't you have class notes or a textbook? Have you tried using Google?
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  3. #3
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    Quote Originally Posted by mr fantastic View Post
    Don't you have class notes or a textbook? Have you tried using Google?
    Are confidence limits and confidence intervals the same thing? Cause it seems that we have some wording of our own here :s
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  4. #4
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    Quote Originally Posted by trojsi View Post
    Are confidence limits and confidence intervals the same thing? Cause it seems that we have some wording of our own here :s
    I suppose you would consider the endpoints of the confidence interval as the confidence limits.
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