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    This is Paper C q5 (b) on the Soloman Statistics 1 papers.

    Find -> T~N(25, 42)

    (b) P( |T-25| < 5)

    I've never come across the "|" symbol in normal statistics Edexcel Papers. Normally I would just standardize and find the z value but this has gotten me stumped.

    Any help please?
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    (Original post by Dalilsp)
    This is Paper C q5 (b) on the Soloman Statistics 1 papers.

    Find -> T~N(25, 42)

    (b) P( |T-25| < 5)

    I've never come across the "|" symbol in normal statistics Edexcel Papers. Normally I would just standardize and find the z value but this has gotten me stumped.

    Any help please?
    Thats just saying P(-5<T-25<5)

    And E(T-25) = E(T) - 25 = 0
    Var(T-25) = Var(T) = 42



    Hence, T-25~N(0, 42)


    Then just do your Z transformations and work it out from there.
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    (Original post by Dalilsp)
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    (Original post by Asklepios)
    Thats just saying P(-5<T-25<5)

    And E(T-25) = E(T) - 25 = 0
    Var(T-25) = Var(T) = 42



    Hence, T-25~N(0, 42)


    Then just do your Z transformations and work it out from there.
    They wouldn't even ask a question like that for edexcel, stick to edexcel for s1.
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    Yeah I probably will. My bro said that was modulus which is FP1 in FM. Will do that in the summer. Thanks!
 
 
 
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