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Goodness of fit test

Hello,

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

ImageUploadedByStudent Room1466168955.476849.jpg


Posted from TSR Mobile
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!

ImageUploadedByStudent Room1466168955.476849.jpg


Posted from TSR Mobile


You have to use the PDF of an expeonential distribution with mean 7.5.
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nemanuel96
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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!


Posted from TSR Mobile
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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