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    P(Z>a)=0.2

    I really don't understand.
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    (Original post by snookin)
    P(Z>a)=0.2

    I really don't understand.
    So P(Z<a) = 0.8
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    Yeah I got that bit but 0.8 isn't on the table so how do you find a?
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    (Original post by snookin)
    Yeah I got that bit but 0.8 isn't on the table so how do you find a?
    IF you are doing Edexcel then 0.7995 is close enough.
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    (Original post by steve2005)
    IF you are doing Edexcel then 0.7995 is close enough.
    The answer in the back of the book is 0.8416 not 0.84 though.
    :confused:

    Edit: Yeah, I am doing Edexcel
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    (Original post by snookin)
    The answer in the back of the book is 0.8416 not 0.84 though.
    :confused:

    Edit: Yeah, I am doing Edexcel
    OK they have used the table on the next page BUT it does not matter too much. I think 0.84 would get full marks.
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    There's a table on the next page! I never noticed that before...
    Cheers
 
 
 
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