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    Basic Business Statistics : Frequency Distributions and Percentages (7 Problems)

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    19. The data displayed below represent monthly phone bills for a random sample of small business customers.

    208 133 165 179 258 212 178 178
    209 212 150 198 137 258 277 145
    234 176 209 220 209 160 151 279
    177 199 212 188 162 125 221 147
    215 245 198 245 275 180 203 226

    Which of the following would be the most appropriate class interval for displaying the data above in a frequency distribution with 5 intervals?
    a. 40
    b. 8
    c. 35
    d. 30

    Please see attached for full question.

    20. In an exit questionnaire 55 employees were asked to indicate a single major reason for leaving the company. Here are the results:

    Reason given Number
    Dissatisfaction with salary 15
    Commute was too long 12
    Dissatisfaction with supervisor 18
    Dissatisfaction with benefits 10
    What percent of employees were dissatisfied with either their salary
    or their supervisor?

    a. 33%
    b. 55%
    c. 60%
    d. 58%

    21. The results of a random sampling of bounced check fees is displayed
    below:
    Stem-and-Leaf Display
    for Bounced Check Fee
    Stem unit: 10
    0 4 7 7 9 9
    1 3 4 5 5 6 8
    2 0 0 0 2 3 4 5 5 5 5 9 9 9
    3 0 0 1 5 5 5 8 8
    4 0 0 0 2 2 5 5 5
    5 0 2 5 5
    6 0 3 5
    What percentage of the observed fees were more than $25?
    a. 9%
    b. 55%
    c. 61%
    d. 64%

    22. The ordered array below represents the number of payoff demand
    notices received by a mortgage company over a 25-day period.

    11 12 13 13 14 15 16 16 16 17 18 19 21
    22 22 24 25 27 27 29 31 32 33 33 42

    If a cumulative relative frequency distribution for the number of
    payoff demand notices received by the escrow company is
    constructed with a first class of 10 but less than 15. What would be
    the cumulative percentage of the 20 but less than 25 class?
    a. 16%
    b. 20%
    c. 40%
    d. 64%

    23. The table below displays the opinions of a sample of college
    students, broken down by gender, about a proposed bill to change
    the tax structure for capital gains:

    Female Male Totals
    For 87 65 152
    Neutral 25 14 39
    Against 63 98 161
    Totals 175 177 352

    Referring to the table above, how many people are against the plan?
    a. 63
    b. 98
    c. 161
    d. 352

    24. Referring to the table in #23 above, what percentage of the women
    are neutral to the plan?
    a. 7%
    b. 14%
    c. 25%
    d. 64%

    25. Referring to the table in #23 above, what percentage of the total
    sample are in favor of the plan?
    a. 18.47%
    b. 43.18%
    c. 49.72%
    d. 50.28%

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    https://brainmass.com/math/fractions-and-percentages/basic-business-statistics-frequency-distributions-and-percentages-7-problems-39413

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