Stats Chapter 2 Tft

Front 1

1. A frequency distribution groups data into classes showing the number of observations in each class.

Back 1

TRUE

Front 2

2. A frequency distribution for qualitative data has class limits.

Back 2

FALSE

Front 3

3. To summarize the gender of students attending a college, the number of classes in a frequency distribution depends on the number of students.

Back 3

FALSE

Front 4

4. In frequency distributions, classes are mutually exclusive if each individual, object, or measurement is included in only one category.

Back 4

TRUE

Front 5

5. In a bar chart, the x-axis is labeled with the values of a qualitative variable.

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TRUE

Front 6

6. In a bar chart, the heights of the bars represent the frequencies in each class.

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TRUE

Front 7

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

Front 8

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

Front 9

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

Front 10

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

Front 11

11. A pie chart is similar to a relative frequency distribution.

Back 11

TRUE

Front 12

12. A pie chart shows the relative frequency in each class.

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TRUE

Front 13

13. To construct a pie chart, relative class frequencies are used to graph the "slices" of the pie.

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TRUE

Front 14

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

Front 15

15. A frequency polygon is a very useful graphic technique when comparing two or more distributions.

Back 15

TRUE