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Math Help - standard deviation

  1. #1
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    standard deviation

    I am very,very bad at these questions I don't know why haha

    The scores for a particular examination are normally distributed with a mean of 54.8 percent. the standard deviation is 16.3%. what is the probability of a student getting a mark of 75% or more
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  2. #2
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    Quote Originally Posted by dan123 View Post
    I am very,very bad at these questions I don't know why haha

    The scores for a particular examination are normally distributed with a mean of 54.8 percent. the standard deviation is 16.3%. what is the probability of a student getting a mark of 75% or more
    Hi dan,

    Check the probability of the following in the table, You should be able to get the answer:

    P(Z> \frac{75-54.8}{16.3})
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