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    Normal Distribution of Average Life Expectancy

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    A recent study found that the average life expectancy of a person living in Africa is 53 years with a standard deviation of 7.5 years. If a person in Africa is selected at random, what is the probability that the person will die before the age of 65?

    a. 94.52%
    b. 82.89%
    c. 94.95%
    d. 88.49%

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    https://brainmass.com/statistics/normal-distribution/normal-distribution-average-life-expectancy-178005

    Solution Preview

    M = 53, SD = 7.5, x = 65

    z = (x - M)/SD

    z = (65 - ...

    Solution Summary

    Problem solved.

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