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S2 help

ImageUploadedByStudent Room1454704426.005775.jpg

For question 1)a why do we sub in 5. Can't we sub in 4 or 3 cause it's in the range


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Original post by Lilly1234567890
ImageUploadedByStudent Room1454704426.005775.jpg

For question 1)a why do we sub in 5. Can't we sub in 4 or 3 cause it's in the range


Posted from TSR Mobile


But what would F(4) or F(3) give you, or how would it help work out what k is? :h:
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Ayman!
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Original post by Lilly1234567890
ImageUploadedByStudent Room1454704426.005775.jpg

For question 1)a why do we sub in 5. Can't we sub in 4 or 3 cause it's in the range


Posted from TSR Mobile


It's a CDF. For x = 5, F(x) must be 1 as this is the last x value in the range.
Original post by Lilly1234567890
ImageUploadedByStudent Room1454704426.005775.jpg

For question 1)a why do we sub in 5. Can't we sub in 4 or 3 cause it's in the range


Posted from TSR Mobile


What does F(x) represent, and therefore how can you use it to find k
Original post by Lilly1234567890
ImageUploadedByStudent Room1454704426.005775.jpg

For question 1)a why do we sub in 5. Can't we sub in 4 or 3 cause it's in the range


Posted from TSR Mobile


you'd miss out a little bit of the area under the pdf curve if you substituted in 4 or 3.
Original post by SeanFM
But what would F(4) or F(3) give you, or how would it help work out what k is? :h:


oh yeah i wont get the right k value. thanks!
Original post by aymanzayedmannan
It's a CDF. For x = 5, F(x) must be 1 as this is the last x value in the range.


thanks !
Original post by samb1234
What does F(x) represent, and therefore how can you use it to find k


got it. thanks !
thanks !

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