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Chapter 02 - Describing Data: Frequency Tables, Frequency Distributions, and Graphic PresentationChapter 02Describing Data: Frequency Tables, Frequency Distributions, and Graphic PresentationTrue / False Questions1. A frequency distribution groups data into classes showing the number of observations in each class. True False2. A frequency distribution for qualitative data has class limits. 3. To summarize the gender of students attending a college, the number of classes in a frequency distribution depends on the number of students. 4. In frequency distributions, classes are mutually exclusive if each individual, object, or measurement is included in only one category. 5. In a bar chart, the x-axis is labeled with the values of a qualitative variable. True False6. In a bar chart, the heights of the bars represent the frequencies in each class. 7. The midpoint of a class, which is also called a class mark, is halfway between the lower and upper limits. 2-1
Chapter 02 - Describing Data: Frequency Tables, Frequency Distributions, and Graphic Presentation8. A class interval, which is the width of a class, can be determined by subtracting the lower limit of a class from the lower limit of the next higher class. 9. To convert a frequency distribution to a relative frequency distribution, divide each class frequency by the sum of the class frequencies. True False10. To convert a frequency distribution to a relative frequency distribution, divide each class frequency by the number of classes. 11. A pie chart is similar to a relative frequency distribution. 12. A pie chart shows the relative frequency in each class. 13. To construct a pie chart, relative class frequencies are used to graph the "slices" of the pie. True False14. A cumulative frequency distribution is used when we want to determine how many observations lie above or below certain values. 15. A frequency polygon is a very useful graphic technique when comparing two or more distributions. 2-2
Chapter 02 - Describing Data: Frequency Tables, Frequency Distributions, and Graphic PresentationMultiple Choice Questions16. Monthly commissions of first-year insurance brokers are $1,270, $1,310, $1,680, $1,380, $1,410, $1,570, $1,180 and $1,420. These figures are referred to as: