1. The Basic Practice of Statistics
SEVENTH EDITION
DAVID S. MOORE, Purdue University
WILLIAM I. NOTZ, The Ohio State University,
MICHAEL A. FLIGNER, University of California at Santa Cruz
Chapter-21
Comparing Two Means
Copyright © 2015 by W. H. Freeman and Company

2. Chapter Opener, The Basic Practice of Statistics, © 2015 W. H
Chapter Opener, The Basic Practice of Statistics, © 2015 W. H. Freeman, © Javier Larrea/age fotostock

3. Table 21.1, The Basic Practice of Statistics, © 2015 W. H. Freeman

4. Figure 21.1, The Basic Practice of Statistics, © 2015 W. H. Freeman

5. Figure 21.2, The Basic Practice of Statistics, © 2015 W. H. Freeman

6. Unnumbered art Page 492, The Basic Practice of Statistics, © 2015 W. H
Unnumbered art Page 492, The Basic Practice of Statistics, © 2015 W. H. Freeman, Hero Images/Getty Images

7. Figure 21.3, The Basic Practice of Statistics, © 2015 W. H. Freeman

8. Figure 21.4, The Basic Practice of Statistics, © 2015 W. H. Freeman

9. Figure 21.5, The Basic Practice of Statistics, © 2015 W. H. Freeman

10. Table 21.2, The Basic Practice of Statistics, © 2015 W. H. Freeman

11. Figure 21.6, The Basic Practice of Statistics, © 2015 W. H. Freeman

12. Unnumbered art Page 509, The Basic Practice of Statistics, © 2015 W. H
Unnumbered art Page 509, The Basic Practice of Statistics, © 2015 W. H. Freeman, Voisin/Phanie/Science Source

13. Unnumbered art Page 512, The Basic Practice of Statistics, © 2015 W. H
Unnumbered art Page 512, The Basic Practice of Statistics, © 2015 W. H. Freeman, © Hugh Clark/Frank Lane Picture Agency/Corbis

14. Table 21.3, The Basic Practice of Statistics, © 2015 W. H. Freeman

15. Unnumbered art Page 514, The Basic Practice of Statistics, © 2015 W. H
Unnumbered art Page 514, The Basic Practice of Statistics, © 2015 W. H. Freeman, Art Wolfe/Getty Images

16. Table 21.4, The Basic Practice of Statistics, © 2015 W. H. Freeman