Elementary statistics / 
Janet T. Spence ... et al. 
 - 4th ed. 
 - Englewood Cliffs, N.J. :  Prentice-Hall,  1983 
 - 334 p. :  ill. ;  24 cm. 
 - The century psychology series .
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>LCCN: </label>82-010177 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Psychometrics