Langley, Russell. <br/><br/>
Practical statistics simply explained. 

 - Rev. ed. 
 - New York,  Dover Publications  [1971, c1970] 
 - ix, 399 p.  illus.  22 cm. 
<br/><br/> 1968 ed. has title: Practical statistics for non-mathematical people. 
<br/><br/><label>ISBN: </label>0486227294 (pbk) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Statistics.<br/>Probabilities.
<br/><br/><label>Dewey Class. No.: </label>519 DOV 1971 A059 Or.