Ravid, Ruth. <br/><br/>
Practical statistics for educators / 
Ruth Ravid. 
 - 4th ed. 
 - Lanham, Md. :  Rowman & Littlefield,  c2010. 
 - xvi, 256 p. :  ill. ;  26 cm. 
<br/><br/> Includes index. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>9781442206557 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Educational statistics--Study and teaching.<br/>Educational tests and measurements.