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Math Help - Need a solution to this problem

  1. #16
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    Quote Originally Posted by Airjunkie View Post
    No, I dont have the information, and my school is closed all week and i want to get this done before the weekend.

    So, i remember my teacher setting up my calculator or showing me how to get it into help mode, so that like, for example, if i did normalcdf it would have showed me what i needed to enter.

    If i can find how to activate that help guidance thing again i will be in good shape.
    Manuals for many calculators such as from the TI and Casio range can be found on-line.
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  2. #17
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    InvNorm(Area to the left of the value you have,μ,σ)

    Okay so now for q3 would i do

    Invnorm(.00000001,30,sqrt of 500) ?
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  3. #18
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    Quote Originally Posted by Airjunkie View Post
    InvNorm(Area to the left of the value you have,μ,σ)

    Okay so now for q3 would i do

    Invnorm(.00000001,30,sqrt of 500) ?
    I have told you that Pr(U > T) = 0.01. So the area to the left is 1 - 0.01. THis is not equal to the number in red (a number from where it has come from I have no idea).
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  4. #19
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    Invnorm(.99,30,sqrt of 500) ?

    =82.0187

    not sure how that number relates to q3 though...
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  5. #20
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    Quote Originally Posted by Airjunkie View Post
    Invnorm(.99,30,sqrt of 500) ?

    =82.0187

    not sure how that number relates to q3 though...
    T = 82.0187 and I have previously defined what T. Read the guidance that has previously been posted. Please.
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  6. #21
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    Thanks again.


    2.)91% of the days the train will have to wait

    3.) They should delay the train 82.01 minutes so that the probability to wait is .01.

    I beleive we've finally made it through this problem eh?
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