Preface ix NEW FOR THIS EDITION The second edition of this book is intended to extend the strengths of the rst Some of the changes are More than 250 new problems have been included Many examples have been updated Material on resistance to outliers has been added to Chapter 1 Material on interpreting the slope of the least squares line has been added to Chapter 2 Material on the F test for variance has been added to Chapter 7 The exposition has been improved in a number of places ACKNOWLEDGMENTS I am indebted to many people for contributions at every stage of development I received many valuable suggestions from my colleagues Gus Greivel Ashlyn Munson and Melissa Laeser at the Colorado School of Mines I am particularly grateful to Jack Miller of The University of Michigan who found many errors and made many valuable suggestions for improvement The sta at McGraw Hill has been extremely capable and supportive In particular I would like to express thanks to Product Developer Tina Bower Content Project Manager Jeni McAtee and Senior Project Manager Sarita Yadav for their patience and guidance in the preparation of this edition William NavidiPreface ix NEW FOR THIS EDITION The second edition of this book is intended to extend the strengths of the rst Some of the changes are More than 250 new problems have been included Many examples have been updated Material on resistance to outliers has been added to Chapter 1 Material ...on interpreting the slope of the least squares line has been added to Chapter 2 Material on the F test for variance has been added to Chapter 7 The exposition has been improved in a number of places ACKNOWLEDGMENTS I am indebted to many people for contributions at every stage of development I received many valuable suggestions from my colleagues Gus Greivel Ashlyn Munson and Melissa Laeser at the Colorado School of Mines I am particularly grateful to Jack Miller of The University of Michigan who found many errors and made many valuable suggestions for improvement The sta at McGraw Hill has been extremely capable and supportive In particular I would like to express thanks to Product Developer Tina Bower Content Project Manager Jeni McAtee and Senior Project Manager Sarita Yadav for their patience and guidance in the preparation of this edition William Navidi