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Question on confidence interval

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  • #38305

    chhabra
    Participant

    Formulae for gage error at 95% confidence level is (5.15/d) MeanR. 
    Now, if we have to change the cofidence level to suppose 70, how will the value of this 5.15 change?
    Please help.
    Amit

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    #114494

    blue
    Participant

    1. The number there should be 99% for 5.15 SD.
    2. If you look at Z on 0.995 (0.5% on a single tail), you will arrive at Z = 2.575, double it and you see that 5.15 SD covers 99% of your data given a normal distribution.
    Apply the same logic to solve your 70% problem.

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