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