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    Hello,

    I'm having trouble with question (b) as to how to find the probability, P(X=x). Any help would be greatly appreciated!

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    (Original post by nemanuel96)
    Hello,

    I'm having trouble with question (b) as to how to find the probability, P(X=x). Any help would be greatly appreciated!

    Name:  ImageUploadedByStudent Room1466168955.476849.jpg
Views: 70
Size:  115.5 KB


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    You have to use the PDF of an expeonential distribution with mean 7.5.
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    (Original post by SeanFM)
    You have to use the PDF of an expeonential distribution with mean 7.5.
    Thanks Sean, yes I used that 1/7.5 = 0.1333. However, I'm not entirely sure how to get the probability for all of them which is annoying.

    Would I have to use the midpoints and do e(-0.1333*x)?

    Thanks again!


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    (Original post by nemanuel96)
    Thanks Sean, yes I used that 1/7.5 = 0.1333. However, I'm not entirely sure how to get the probability for all of them which is annoying.

    Would I have to use the midpoints and do e(-0.1333*x)?

    Thanks again!


    Posted from TSR Mobile
    Oops, sorry - I see what you mean now! Perhaps you can use the CDF instead of the PDF?
 
 
 
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