Test Bank for Basic Statistics for Business and Economics 8th Edition Lind

1. A frequency distribution groups data into classes showing the number of observations in each class. True False 2. A frequency distribution for qualitative data has class limits. True False 3. To summarize the gender of students attending a college, the number of classes in a frequency distribution depends on the number of students. True False 4. In frequency distributions, classes are mutually exclusive if each individual, object, or measurement is included in only one category. True False 5. In a bar chart, the x-axis is labeled with the values of a qualitative variable. True False 6. In a bar chart, the heights of the bars represent the frequencies in each class. True False 7. The midpoint of a class, which is also called a class mark, is halfway between the lower and upper limits. True False 8. A class interval, or class width, can be determined by subtracting the lower limit of a class from the lower limit of the next higher class. True False 9. To convert a frequency distribution to a relative frequency distribution, divide each class frequency by the sum of the class frequencies. True False 10 To convert a frequency distribution to a relative frequency distribution, . divide each class frequency by the number of classes. True False 11 A pie chart is similar to a relative frequency distribution. . True False 12 A pie chart shows the relative frequency in each class. . True False 13 To construct a pie chart, relative class frequencies are used to graph . the "slices" of the pie. True False 14 A cumulative frequency distribution is used when we want to determine . how many observations lie above or below certain values. True False 15 A frequency polygon is a very useful graphic technique when . comparing two or more distributions. True False