Slide 3- 1Copyright © 2010, 2007, 2004 Pearson Education, Inc. All Rights Reserved.

Active Learning Lecture Slides For use with Classroom Response Systems

Elementary Statistics Eleventh Edition

and the Triola Statistics Series

by Mario F. Triola

Chapter 3: Statistics for Describing,

Exploring, and Comparing Data

Slide 3- 2Copyright © 2010, 2007, 2004 Pearson Education, Inc. All Rights Reserved.

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

Slide 3- 3Copyright © 2010, 2007, 2004 Pearson Education, Inc. All Rights Reserved.

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

Slide 3- 4Copyright © 2010, 2007, 2004 Pearson Education, Inc. All Rights Reserved.

Which of the following measures of center is not affected by outliers?

A. Mean

B. Median

C. Mode

Slide 3- 5Copyright © 2010, 2007, 2004 Pearson Education, Inc. All Rights Reserved.

Which of the following measures of center is not affected by outliers?

A. Mean

B. Median

C. Mode

Slide 3- 6Copyright © 2010, 2007, 2004 Pearson Education, Inc. All Rights Reserved.

Find the mode for the given sample data.

79, 25, 79, 13, 25, 29, 56, 79

A. 79

B. 48.1

C. 42.5

D. 25

Slide 3- 7Copyright © 2010, 2007, 2004 Pearson Education, Inc. All Rights Reserved.

Find the mode for the given sample data.

79, 25, 79, 13, 25, 29, 56, 79

A. 79

B. 48.1

C. 42.5

D. 25

Slide 3- 8Copyright © 2010, 2007, 2004 Pearson Education, Inc. All Rights Reserved.

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.

Slide 3- 9Copyright © 2010, 2007, 2004 Pearson Education, Inc. All Rights Reserved.

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.

Slide 3- 10Copyright © 2010, 2007, 2004 Pearson Education, Inc. All Rights Reserved.

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.

Slide 3- 11Copyright © 2010, 2007, 2004 Pearson Education, Inc. All Rights Reserved.

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.

Slide 3- 12Copyright © 2010, 2007, 2004 Pearson Education, Inc. All Rights Reserved.

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

Slide 3- 13Copyright © 2010, 2007, 2004 Pearson Education, Inc. All Rights Reserved.

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

Slide 3- 14Copyright © 2010, 2007, 2004 Pearson Education, Inc. All Rights Reserved.

Which graphic display shows the least detailed information?

A. Histogram

B. Stem-and-leaf plot

C. Boxplot

Slide 3- 15Copyright © 2010, 2007, 2004 Pearson Education, Inc. All Rights Reserved.

Which graphic display shows the least detailed information?

A. Histogram

B. Stem-and-leaf plot

C. Boxplot