Berenson ML <br/><br/>
Statistics for business and economics 
Berenson Ml; Levine Dm 
 - New Jersy  New Jersy, Prentice Hall  1990 
 - 596p 
<br/><br/><label>ISBN: </label>0-13-319096-X 
<br/><br/><label>Source: </label>Textbook