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

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