@book{181506,
	author = {Norris, Richard.},
	title = {Graded exercises in statistics /},
	publisher = {Cambridge University Press,},
	year = {2000.},
	series = {Graded exercises in advanced level mathematics},
	address = {Cambridge :},
	note = {Graded exercises in advanced level mathematics is a series of books providing a conprehensive collection of exercises for the new A and AS specifications. These exercises provide the practice needed to develop understanding and revise for examination. - Back cover.}
}