1. Slide 3- 1 Copyright © 2010 Pearson Education, Inc. Active Learning Lecture Slides For use with Classroom Response Systems Business Statistics First Edition by Sharpe, De Veaux, Velleman Chapter 6: Displaying and Describing Quantitative Data

2. Slide 6- 2 Copyright © 2010 Pearson Education, Inc. You should use a histogram to display categorical data. A. True B. False

3. Slide 6- 3 Copyright © 2010 Pearson Education, Inc. You should use a histogram to display categorical data. A. True B. False

4. Slide 6- 4 Copyright © 2010 Pearson Education, Inc. We might choose to use a stem-and-leaf display rather than a boxplot because it … I. reveals the shape of a distribution. II. is better for large data sets. III. displays the actual data values. A. I only B. II only C. III only D. I, II, and III

5. Slide 6- 5 Copyright © 2010 Pearson Education, Inc. We might choose to use a stem-and-leaf display rather than a boxplot because it … I. reveals the shape of a distribution. II. is better for large data sets. III. displays the actual data values. A. I only B. II only C. III only D. I, II, and III

6. Slide 6- 6 Copyright © 2010 Pearson Education, Inc. When we describe the shape of a distribution we typically do so in terms of its A. modes B. symmetry C. outliers D. all of the above

7. Slide 6- 7 Copyright © 2010 Pearson Education, Inc. When we describe the shape of a distribution we typically do so in terms of its A. modes B. symmetry C. outliers D. all of the above

8. Based on the histogram, what can we say about the shape of the distribution? Slide 6- 8 Copyright © 2010 Pearson Education, Inc. A. It is skewed left. B. It is skewed right. C. It is symmetric. D. It is bimodal.

9. Based on the histogram, what can we say about the shape of the distribution? Slide 6- 9 Copyright © 2010 Pearson Education, Inc. A. It is skewed left. B. It is skewed right. C. It is symmetric. D. It is bimodal.

10. Slide 6- 10 Copyright © 2010 Pearson Education, Inc. Two sections of a class took the same quiz. Section A had 15 students who had a mean score of 80, and Section B had 20 students who had a mean score of 90. Overall, what was the mean score for all students on the quiz? A. 84.3 B. 85.7 C. 85.0 D. It cannot be determined.

11. Slide 6- 11 Copyright © 2010 Pearson Education, Inc. Two sections of a class took the same quiz. Section A had 15 students who had a mean score of 80, and Section B had 20 students who had a mean score of 90. Overall, what was the mean score for all students on the quiz? A. 84.3 B. 85.7 C. 85.0 D. It cannot be determined.

12. Slide 6- 12 Copyright © 2010 Pearson Education, Inc. Whenever we compare more than two groups, a boxplot does a better job than a histogram. A. True B. False

13. Slide 6- 13 Copyright © 2010 Pearson Education, Inc. Whenever we compare more than two groups, a boxplot does a better job than a histogram. A. True B. False

14. Slide 6- 14 Copyright © 2010 Pearson Education, Inc. Which of the following is not included in a five-number summary? A. median B. first quartile C. mean D. maximum

15. Slide 6- 15 Copyright © 2010 Pearson Education, Inc. Which of the following is not included in a five-number summary? A. median B. first quartile C. mean D. maximum

16. Slide 6- 16 Copyright © 2010 Pearson Education, Inc. The SPCA has kept data records for the past 20 years. If they want to show the trend in the number of dogs they have housed, what kind of plot should they make? A. Boxplot B. Time series plot C. Bar graph D. Histogram

17. Slide 6- 17 Copyright © 2010 Pearson Education, Inc. The SPCA has kept data records for the past 20 years. If they want to show the trend in the number of dogs they have housed, what kind of plot should they make? A. Boxplot B. Time series plot C. Bar graph D. Histogram

18. Slide 6- 18 Copyright © 2010 Pearson Education, Inc. Which of the following are measures of the center of a distribution (circle all that apply)? A. Mean B. Variance C. Standard deviation D. Median

19. Slide 6- 19 Copyright © 2010 Pearson Education, Inc. Which of the following are measures of the center of a distribution (circle all that apply)? A. Mean B. Variance C. Standard deviation D. Median

20. Slide 6- 20 Copyright © 2010 Pearson Education, Inc. Which of the following are measures of the spread of a distribution (circle all that apply)? A. Mean B. Variance C. Standard deviation D. Median

21. Slide 6- 21 Copyright © 2010 Pearson Education, Inc. Which of the following are measures of the spread of a distribution (circle all that apply)? A. Mean B. Variance C. Standard deviation D. Median

22. Slide 6- 22 Copyright © 2010 Pearson Education, Inc. If you cannot find a reason for an outlier or remove it, you should use the mean and IQR to summarize the center and spread. A. True B. False

23. Slide 6- 23 Copyright © 2010 Pearson Education, Inc. If you cannot find a reason for an outlier or remove it, you should use the mean and IQR to summarize the center and spread. A. True B. False

24. Slide 6- 24 Copyright © 2010 Pearson Education, Inc. Variables with a distribution that is skewed to the right often benefit from re-expression by (circle all that apply): A. squaring the data values. B. logarithms. C. square roots. D. none of these.

25. Slide 6- 25 Copyright © 2010 Pearson Education, Inc. Variables with a distribution that is skewed to the right often benefit from re-expression by (circle all that apply): A. squaring the data values. B. logarithms. C. square roots. D. none of these.