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    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)
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    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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    But what would F(4) or F(3) give you, or how would it help work out what k is?
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    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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    It's a CDF. For x = 5, F(x) must be 1 as this is the last x value in the range.
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    (Original post by Lilly1234567890)
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    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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    What does F(x) represent, and therefore how can you use it to find k
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    (Original post by Lilly1234567890)
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    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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    you'd miss out a little bit of the area under the pdf curve if you substituted in 4 or 3.
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    (Original post by SeanFM)
    But what would F(4) or F(3) give you, or how would it help work out what k is?
    oh yeah i wont get the right k value. thanks!
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    (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 !
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    (Original post by samb1234)
    What does F(x) represent, and therefore how can you use it to find k
    got it. thanks !
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    (Original post by Raees_Sharif)
    you'd miss out a little bit of the area under the pdf curve if you substituted in 4 or 3.
    thanks !
 
 
 
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