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    Descriptive statistics and empirical rule

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    The following frequency distribution reports the electricity cost for a sample of 50 two-bedroom apartments in Albuquerque, New Mexico, during the month of May of last year.

    Electricity Cost Frequency
    $80 up to $100 3
    100 up to 120 8
    120 up to 140 12
    140 up to 160 16
    160 up to 180 7
    180 up to 200 4
    Total 50

    a. Estimate the mean cost.
    b. Estimate the standard deviation.
    c. Use the Empirical Rule to estimate the proportion of costs within two standard deviations
    of the mean. What are these limits?

    © BrainMass Inc. brainmass.com June 3, 2020, 8:10 pm ad1c9bdddf
    https://brainmass.com/statistics/quantative-analysis-of-data/descriptive-statistics-and-empirical-rule-126606

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    Solution Summary

    The solution gives the details of calculation of mean and standard deviation of a given data. Empirical rule is applied to estimate the proportion of costs within two standard deviations of the mean.

    $2.19

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