Gravetter, Frederick J. <br/><br/>
Essentials of statistics for the behavioral sciences / 
Frederick J. Gravetter, Larry B. Wallnau 
 - 8th ed. 
 - Belmont, CA :  Wadsworth,  c2014 
 - xvi, 631 p. :  ill. (some col.) ;  25 cm. 
<br/><br/> "Instructor's edition. Eighth edition" -- Cover 
<br/><br/>Includes bibliographical references (pages 619-623) and index 
<br/><br/><label>ISBN: </label>9781133956570 (hbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences--Statistical methods