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Math Help - Stuck again

  1. #1
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    Oct 2009
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    Stuck again

    I'm not really sure how to go about solving this.



    "Let a represent the amount of probability within 2.5 standard deviations of the norm. Find a."


    I was thinking that since z is the number of standard deviations, that P(-2.5<z<2.5) and a is the area? From the standard normal distribution table 2.5=.4938. So 2(.4938)= .9876?
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  2. #2
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    Quote Originally Posted by kittysnyde View Post
    I'm not really sure how to go about solving this.



    "Let a represent the amount of probability within 2.5 standard deviations of the norm. Find a."


    I was thinking that since z is the number of standard deviations, that P(-2.5<z<2.5) and a is the area? From the standard normal distribution table 2.5=.4938. So 2(.4938)= .9876?

    looks go to me
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