Welkowitz, Joan. <br/><br/>
Introductory statistics for the behavioral sciences / 
Joan Welkowitz, Robert B. Ewen, Jacob Cohen. 
 - 3rd ed. 
 - San Diego :  Harcourt Brace Jovanovich,  c1982. 
 - xiii, 369 p. :  ill. (some col.) ;  25 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0155459813 (hbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences--Statistical methods.<br/>Psychometrics.<br/>Sociology--Statistical methods.<br/>Education--Statistical methods.