Table of Contents

A Note to Students from the Authors vii

1 A CASE STUDY OF STATISTICS IN ACTION 2

2 EXPLORING DISTRIBUTIONS 22

3 RELATIONSHIPS BETWEEN TWO QUANTITATIVE VARIABLES 100

4 SAMPLE SURVEYS AND EXPERIMENTS 208

5 SAMPLING DISTRIBUTIONS 266

6 PROBABILITY MODELS 326

7 PROBABILITY DISTRIBUTIONS 378

8 INFERENCE FOR PROPORTIONS 412

9 INFERENCE FOR MEANS 478

10 CHI-SQUARE TESTS 576

11 INFERENCE FOR REGRESSION 628

12 STATISTICS IN ACTION: CASE STUDIES 678

Appendix: Statistical Tables 699

Table A: Standard Normal Probabilities 699

Table B: t-Distribution Critical Values 701

Table C: Chi-Square Distribution Critical Values 702

Table D: Random Digits 703

Glossary 704

Brief Answers to Selected Problems 712

Index 743

Photo Credits 752

About the Author

Ann E. Watkins is professor of mathematics at California State University, Northridge. She received her PhD from the University of California, Los Angeles. Before moving to CSUN in 1990, she taught for 15 years at Los Angeles Pierce College and before that taught junior high school.
She is the former president of the Mathematical Association of America, having served previously as second vice-president, governor of the Southern California Section, chair of the Coordinating Council on Education, and co-editor of the College Mathematics Journal. She is a former chair of the Advanced Placement Statistics Development Committee. She was selected as the 1994-1995 Cal State Northridge Outstanding Professor and won the 1997 Cal State Northridge Award for the Advancement of Teaching Effectiveness. In 1999, she was elected a Fellow of the American Statistical Association.