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    Frequency Distibution Problems

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    30.Determine the estimated mean of the following frequency distribution

    class frequency
    0 up to 5 2
    5 up to 10 7
    10 up to 15 12
    15 up to 20 6
    20 up to 25 3

    93. compute the range, the standard deviation, and the variance

    Each person who applies for an assembly job at carolina furniture inc is given a mechanical aptitude test. one part of the test involves assembling a dresser based on numbered instructions. a sample of the lengths of time it took 42 persons to assemble the dresser was organized into the following frquency distribution.

    length of time(minutes) frequency

    2 up to 4 4
    4 up to 6 8
    6 up to 8 14
    8 up to 10 9
    10 up to 12 5
    12 up to 14 2

    105.
    a. determine the mean, median, and the standard deviation
    b determine the coefficient of skewness using pearsons method
    c. determine the coefficient of skewness using the software method

    listed below are the commissions earned($000) last year by the sales representatives at the furniture patch.

    $3.9 $5.7 $10.6 $13.0 $13.6 $15.1 $15.8 $17.1
    14.4 17.6 22.3 38.6 43.2 87.7

    254. a telephone number consist of seven digits, the first three representing the exchange. how many different telephone numbers are possible within the 537 exchange?

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    Solution Summary

    Frequency distributions are investigated. The solution is detailed and well presented.

    $2.19

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