## Description

## Statistical Techniques in Business And Economics 15th Edition By Lind – Test Bank

**Chapter 04**

**Describing Data: Displaying and Exploring Data**

**True / False Questions**

1. A dot plot is an easy way to represent the relationship between two variables.

True False

2. A dot plot is useful for quickly graphing frequencies in a small data set.

True False

3. A dot plot shows the relative symmetry of a distribution.

True False

4. A dot plot is useful for showing possible outliers.

True False

5. A dot plot is useful for showing the range of the data.

True False

6. A stem-and-leaf diagram shows the actual data values.

True False

7. In a stem-and-leaf display, the leaf represents a class of a frequency distribution.

True False

8. In a stem-and-leaf display, the leaf represents the members of a class in a frequency distribution.

True False

9. Quartiles divide a distribution into four equal parts.

True False

10. Quartiles divide a distribution into ten equal parts.

True False

11. Percentiles divide a distribution into one hundred equal parts.

True False

12. A student scored in the 85^{th} percentile on a standardized test. This means that the student scored lower than 85% of all students who took the test.

True False

13. The 50^{th} percentile of a distribution is the same as the distribution mean.

True False

14. A box plot graphically shows the 10^{th} and 90^{th} percentiles.

True False

15. The “box” in a box plot shows the interquartile range.

True False

16. A box plot shows the relative symmetry of a distribution.

True False

17. The coefficient of skewness is the standard deviation divided by the mean.

True False

18. Pearson’s coefficient of skewness is a measure of a distribution’s symmetry.

True False

19. If a distribution is negatively skewed, the distribution is not symmetrical and the long tail is to the left.

True False

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