24. When a class interval is expressed as: 100 up to 200,
A. Observations with values of 100 are excluded from the class.B. Observations with values of 200 are included in the class.C. Observations with values of 200 are excluded from the class.D. The class interval is 99.
25. The relative frequency for a class is computed as the class
26. The relative frequency for a class represents the
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27. A group of 100 students was surveyed about their interest in a new International Studies program. Interest was measured in terms of high, medium, or low. 30 students responded highinterest; 40 students responded medium interest; 30 students responded low interest. What is the relative frequency of students with high interest?
28. A group of 100 students were surveyed about their interest in a new Economics major. Interest was measured in terms of high, medium, or low. 30 students responded high interest; 50 students responded medium interest; 20 students responded low interest. What is the bestway to illustrate the relative frequency of student interest?
A. Cumulative frequency polygonB. Bar chartC. Pie chartD. Frequency table
29. The monthly salaries of a sample of 100 employees were rounded to the nearest ten dollars. They ranged from a low of $1,040 to a high of $1,720. If we want to condense the data into seven classes, what is the most convenient class interval?
30. A student was studying the political party preferences of a university's student population. The survey instrument asked students to identify themselves as a democrat or a republican. This question is flawed because:
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31. A student was studying the political party preferences of a university's student population. The survey instrument asked students to identify their political preference, for example, democrat, republican, libertarian, or other party. The best way to illustrate the frequencies for each political preference is a:

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- Spring '13
- YOYL
- Economics, Frequency, Frequency distribution, Bar chart, Histogram, Summary statistics