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Math Help - Normal distribution table values

  1. #1
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    Normal distribution table values

    Hi
    I need a clarification before my S2 exam on Thursday. How do I find a value of P(Z<0.7925)? This is bearing mind that all the table values are to 2 decimal places. Previously, I have compare it to the closest value and then subtract to get my final result. For example, if I need P(Z<1.212), I would compare it to P(Z<1.21) and P(Z<1.22). Since it is closer to 1.21, I would subtract .002 from the table value. Is this method correct? I am getting a slightly different result to the questions. Please help.
    Thanks.
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  2. #2
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    I would recommend just going with the value you are given which is closest. Thus, for P(Z < 1.212) just use the given precision you know: P(Z < 1.21).
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  3. #3
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    Quote Originally Posted by bryangoodrich View Post
    I would recommend just going with the value you are given which is closest. Thus, for P(Z < 1.212) just use the given precision you know: P(Z < 1.21).
    Thanks. Much appreciated.
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  4. #4
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    There's a "Thanks" button for that haha
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  5. #5
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    Cool! haha
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