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Math Help - Data Management HELP

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    Data Management HELP

    The life span of a particular species of turtle are normally distributed with a mean of 180 years and a standard deviation of 40 years. What proportion of these turtles will live between 100 and 260 years?
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    Quote Originally Posted by Kiran View Post
    The life span of a particular species of turtle are normally distributed with a mean of 180 years and a standard deviation of 40 years. What proportion of these turtles will live between 100 and 260 years?
    Let X be the random variable life of the turtle (in years).

    X ~ Normal(mean = 180, sd = 40)

    Calculate Pr(100 < X < 260).

    Note that this answer is the probability that X lies within 2 sd's of the mean ......
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