Richards, Larry E. <br/><br/>
Business statistics :  why and when / 
Larry E. Richards, Jerry J. LaCava 
 - New York :  McGraw-Hill ,  1978 
 - 466 p. : tables ;  25 cm. 
<br/><br/>p. 411-412 
<br/><br/><label>ISBN: </label>0070522731 
<br/><br/><label>LCCN: </label>77-14314 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Statistics<br/>Business--Statistical methods