Ray, William Samuel, 1917-  Ray, William Samuel, 1917- <br/><br/>
Statistics in psychological research. 

 - New York :  Macmillan,  1962. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Psychology -- Research.--Psychology -- Research.<br/>Statistics.
<br/><br/><label>LC Class. No.: </label>BF 39 RAY 1962