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    Descriptive Statistics and Normal Probability

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    1. According to the 2009 National Survey on Drug use and Health, among people age 12 or older who reported using pain reliever non-medically in the past year, 70% got the drugs from a friend or relative (either for free, purchased, or by theft) Another 18 percent reported getting the drugs from a one doctor. With the following numbers use the age groups listed to determine the mean to determine the targeted age group.

    Male Female
    12 15
    13 16
    14 18
    15 19
    16 21
    17 24
    18 26
    19 30
    22 32
    23 36
    24 39
    25 42
    28 44
    30 47
    32 49
    37 51
    40 53
    43 56
    50 60

    A) What is the variance for male?
    B) What is the variance for female?
    C) What is the targeted age group?
    D) Graph the results of male and female variance

    2.
    The following are two competitors' laboratories. Follow normal distribution.
    Laboratory 1 the mean is $38,000 with a standard deviation of $13,000.
    Laboratory 2 the mean is $56,000 with a standard deviation of $21,000.

    a) What proportion of laboratory 1 is below the mean of laboratory 2?
    b) What is the average earning of laboratory 1 showing 12% of cost?
    c) What are the earning of laboratory 2 that shows the lowest of 7% of?

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    https://brainmass.com/statistics/normal-distribution/descriptive-statistics-normal-probability-599389

    Solution Summary

    The solution provides step by step method for the calculation of mean, variance and normal probability. Formulas for the calculation and Interpretations of the results are also included.

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