Healey, Joseph F.,  1945- <br/><br/>
The essentials of statistics :  a tool for social research / 
Joseph F. Healey. 
 - 2nd ed. 
 - Belmont, CA :  Wadsworth/Cengage Learning,  c2010. 
 - xix, 440 p. :  ill. ;  23 cm. 
<br/><br/> Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences--Statistical methods.<br/>Statistics.