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Homework Help: Statistics, Probability ! Help!

  1. Jul 17, 2011 #1
    1. The problem statement, all variables and given/known data
    Assume the life expectancy of U.S. males is normally distributed with a mean of 80 years and a standard deviation of 5 years. What is the probability that a randomly selected male lives more than 86 years?

    2. Relevant equations
    (work shown below)

    3. The attempt at a solution

    z=(86-80)/(5) = 6/5 = 1.2
    P=1 - .8849 = 0.1151
  2. jcsd
  3. Jul 19, 2011 #2


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    Looks fine. Just checking if you did it right?
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