1.	Find the standard deviation of the data in the stem-and-leaf plot to the nearest hundredth.
		A.	228.50	B.	10.72
		C.	11.74	D.	217.00
		Hint
	2.	Find the standard deviation of the set {15, 42, 30, 22, 19, 32} to the nearest hundredth.
		A.	10.14	B.	9.91
		C.	9.05	D.	10.03
		Hint
	3.	The enrollments at the University of Texas at Austin in some recent years were 47,905, 48,008, 48,857, 48,906, and 49,009. Find the standard deviation of the data.
		A.	434.00	B.	461.28
		C.	452.93	D.	477.62
		Hint
	4.	The scores on a national achievement test are normally distributed with a mean of 50 and a standard deviation of 10. Out of a group of 200 students, how many would you expect to score more than 70?
		A.	1	B.	10
		C.	32	D.	5
		Hint
	5.	Compute the variance and standard deviation for the set of {3, 4, 4, 7, 9, 9, 12, 16}. Round to the nearest tenth.
		A.	16.5; 4.1	B.	15.8; 4.0
		C.	4.2; 2.0	D.	17.5; 4.2
		Hint