Ritchey, Ferris Joseph. <br/><br/>
The statistical imagination :  elementary statistics for the social sciences / 

 - Boston,   McGraw-Hill,  2000. 
 - xxiv, 600 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographical references (p. 591-593) and index. 
<br/><br/><label>ISBN: </label>0072891238 
<br/><br/><label>LC Class. No.: </label>HA29  / .R51 2000