Exhibit 2-1 The numbers of hours worked (per week) by 400 statistics students are shown below....

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Exhibit 2-1 The numbers of hours worked (per week) by 400 statistics students are shown below. a. b. C. d. 1. Refer to Exhibit 2-1. The class width for this distribution is 9 a. b. C. d. a. b. 2. Refer to Exhibit 2-1. The number of students working 19 hours or less is 80 is 100 C. d. a. b. 3. Refer to Exhibit 2-1. The relative frequency of students working 9 hours or less is 20 is 180 is 300 a. b. C. 75% d. 80% Frequency 20 80 is 10 is 39, which is: the largest value minus the smallest value or 39 -0 = 39 varies from class to class is 100 is 0.95 0.05 Discussion z 200 100 4. Refer to Exhibit 2-1. The percentage of students working 19 hours or less is 20% 25% a. b. C. d. Number of hours 0-9 10-19 20 - 29 30-39 C. d. is 0.5 5. Refer to Exhibit 2-1. The cumulative relative frequency for the class of 20 - 29 is 300 is 0.25 is 0.75 6. Refer to Exhibit 2-1. The cumulative percent frequency for the class of 30-39 is 100% 75% 50% 25% Exhibit 2-1 The numbers of hours worked (per week) by 400 statistics students are shown below. a. b. C. d. 1. Refer to Exhibit 2-1. The class width for this distribution is 9 a. b. C. d. a. b. 2. Refer to Exhibit 2-1. The number of students working 19 hours or less is 80 is 100 C. d. a. b. 3. Refer to Exhibit 2-1. The relative frequency of students working 9 hours or less is 20 is 180 is 300 a. b. C. 75% d. 80% Frequency 20 80 is 10 is 39, which is: the largest value minus the smallest value or 39 -0 = 39 varies from class to class is 100 is 0.95 0.05 Discussion z 200 100 4. Refer to Exhibit 2-1. The percentage of students working 19 hours or less is 20% 25% a. b. C. d. Number of hours 0-9 10-19 20 - 29 30-39 C. d. is 0.5 5. Refer to Exhibit 2-1. The cumulative relative frequency for the class of 20 - 29 is 300 is 0.25 is 0.75 6. Refer to Exhibit 2-1. The cumulative percent frequency for the class of 30-39 is 100% 75% 50% 25%

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