@book{12720,
	author = {Spiegel, Murray R.},
	title = {Schaum's outline of theory and problems of statistics /},
	publisher = {McGraw-Hill,},
	year = {1992},
	series = {Schaum's outline series},
	address = {London :},
	edition = {2nd ed. in SI units},
	note = {Includes index}
}