Gravetter, Frederick J. <br/><br/>
Essentials of statistics for the behavioral sciences / 
Frederick J Gravetter, Larry B. Wallnau. 
 - 7th ed. 
 - Belmont, CA :  Wadsworth/Cengage Learning,  2011. 
 - xix, 634 p. :  ill. ;  26 cm. 
<br/><br/>Includes bibliographical references (p. 624-627) and index. 
<br/><br/><label>ISBN: </label>9780495812203 (pbk.)  RM519.55 049581220X (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences--Statistical methods.