Healey, Joseph F. <br/><br/>
Statistics :  a tool for social research / 
Joseph F. Healey 
 - 8th ed. 
 - Belmont, CA  :  Wadsworth ,  2009 
 - 512 p. :  ill. ;  24 cm. 
<br/><br/><label>ISBN: </label>9780495595199 0495096555 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Statistics