@book{227956,
	author = {Ravid, Ruth. and Oyer, Elizabeth, and ebrary, Inc.},
	title = {Study guide for practical statistics for educators},
	publisher = {Rowman & Littlefield Publishers,},
	year = {2011.},
	address = {Lanham [Md.] :},
	edition = {4th ed.},
	note = {Companion to: Practical statistics for educators.},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10460940}
}