1. Slide 3- 1 Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley Active Learning Lecture Slides For use with Classroom Response Systems Elementary Statistics Tenth Edition and the Triola Statistics Series by Mario F. Triola Chapter 3 Statistics for Describing, Exploring, and Comparing Data

2. Slide 3- 2 Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley Which measure of center is the only one that can be used with data at the nominal level of measurement? A.Mean B.Median C.Mode

3. Slide 3- 3 Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley Which measure of center is the only one that can be used with data at the nominal level of measurement? A.Mean B.Median C.Mode

4. Slide 3- 4 Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley Which of the following measures of center is not affected by outliers? A.Mean B.Median C.Mode

5. Slide 3- 5 Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley Which of the following measures of center is not affected by outliers? A.Mean B.Median C.Mode

6. Slide 3- 6 Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley Find the mode (s) for the given sample data. 79, 25, 79, 13, 25, 29, 56, 79 A.79 B.48.1 C.42.5 D.25

7. Slide 3- 7 Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley Find the mode (s) for the given sample data. 79, 25, 79, 13, 25, 29, 56, 79 A.79 B.48.1 C.42.5 D.25

8. Slide 3- 8 Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley Which is not true about the variance? A.It is the square of the standard deviation. B. It is a measure of the spread of data. C. The units of the variance are different from the units of the original data set. D. It is not affected by outliers.

9. Slide 3- 9 Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley Which is not true about the variance? A.It is the square of the standard deviation. B. It is a measure of the spread of data. C. The units of the variance are different from the units of the original data set. D. It is not affected by outliers.

10. Slide 3- 10 Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley Weekly sales for a company are $10,000 with a standard deviation of $450. Sales for the past week were $9050. This is A.Unusually high. B.Unusually low. C.About right.

11. Slide 3- 11 Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley Weekly sales for a company are $10,000 with a standard deviation of $450. Sales for the past week were $9050. This is A.Unusually high. B.Unusually low. C.About right.

12. Slide 3- 12 Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley In a data set with a range of 55.1 to 102.8 and 300 observations, there are 207 data points with values less than 88.6. Find the percentile for 88.6. A.32 B.116.03 C.69 D.670

13. Slide 3- 13 Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley In a data set with a range of 55.1 to 102.8 and 300 observations, there are 207 data points with values less than 88.6. Find the percentile for 88.6. A.32 B.116.03 C.69 D.670

14. Slide 3- 14 Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley Finding the Percentile of a Given Score Percentile of value x = 100 number of values less than x total number of values

15. Slide 3- 15 Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley Which graphic display shows the least detailed information? A.Histogram B.Stem-and-leaf plot C.Boxplot

16. Slide 3- 16 Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley Which graphic display shows the least detailed information? A.Histogram B.Stem-and-leaf plot C.Boxplot