23.In a cumulative relative frequency distribution, the last class will have a cumulative relative frequency equal to
a.oneb.zeroc.100d.None of the other answers are correct.ANSWER:a
24.In a cumulative percent frequency distribution, the last class will have a cumulative percent frequency equal to
25.The difference between the lower class limits of adjacent classes provides the
Exhibit 2-1The numbers of hours worked (per week) by 400 statistics students are shown below.Number of hoursFrequency0 92010 198020 2920030 3910026.Refer to Exhibit 2-1. The class width for this distribution

c.is 39, which is: the largest value minus the smallest value or 39
0 = 39d.varies from class to classANSWER:b
27.Refer to Exhibit 2-1. The midpoint of the last class is
28.Refer to Exhibit 2-1. The number of students working 19 hours or less
29.Refer to Exhibit 2-1. The relative frequency of students working 9 hours or less
30.Refer to Exhibit 2-1. The cumulative relative frequency for the class of 20
29
a.is 300b.is 0.25c.is 0.75d.is 0.5ANSWER:c
31.Refer to Exhibit 2-1. The percentage of students working 10 19 hours is
32.Refer to Exhibit 2-1. The percentage of students working 19 hours or less is
33.Refer to Exhibit 2-1. The cumulative percent frequency for the class of 30 is
39

34.Refer to Exhibit 2-1. The cumulative frequency for the class of 20
29
a.is 200b.is 300c.is 0.75d.is 0.50ANSWER:b
35.Refer to Exhibit 2-1. If a cumulative frequency distribution is developed for the above data, the last class will have a cumulative frequency of
36.Refer to Exhibit 2-1. The percentage of students who work at least 10 hours per week is
Exhibit 2-2Information on the type of industry is provided for a sample of 50 Fortune 500 companies.Industry TypeFrequencyBanking7Consumer Products15Electronics10Retail1837.Refer to Exhibit 2-2. The number of industries that are classified as retail is

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- Frequency distribution, Histogram