1.	For a set of data organized in a frequency distribution, the upper and lower values in each interval are called ______.
		A.	class limits	B.	the class range
		C.	class marks	D.	class intervals
		Hint
	2.	Construct a stem-and-leaf plot for the data {67, 90, 83, 85, 73, 80, 78, 79, 68, 71}.
		A.
		B.
		C.
		D.
		Hint
	3.	Draw a box-and-whisker plot for the set of data {67, 90, 83, 85, 73, 80, 78, 79, 68, 71}.
		A.		B.
		C.		D.
		Hint
	4.	What is the standard deviation for the data {67, 90, 83, 85, 73, 80, 78, 79, 68, 71}?
		A.	8	B.	about 7.17
		C.	about 51.44	D.	about 7.56
		Hint
	5.	Use the partial table below to find the limit above which 90% of the data lies if the mean is 30.5 and the standard deviation is 13.8. Assume the data are normally distributed.
		A.	12.56	B.	22.22
		C.	23.6	D.	16.7
		Hint
	6.	From a population of 32 items, a sample of 25 items is chosen and found to have a standard deviation of 57.0. Find the standard error of the mean.
		A.	7.25	B.	11.4
		C.	10.1	D.	2.28
		Hint
	7.	Use the partial table below. If = 6.4.0, N = 100, and = 37.1, find the interval about the sample mean that has a 1% level of confidence.
		A.	about 36.04-38.16	B.	about 35.45-38.75
		C.	about 35.85-38.35	D.	about 35.18-39.02
		Hint
	8.	Find the class mark of 30–40 interval for the following data. 22, 35, 12, 37, 19, 36, 39, 13, 13, 36, 11, 37, 13, 38, 21, 37, 35, 29, 37
		A.	36	B.	37
		C.	35	D.	38
		Hint
	9.	Find the set of data that is bimodal.
		A.	13, 13, 16, 15, 14, 18, 17
		B.	14, 12, 19, 15, 16, 18, 11
		C.	12, 13, 16, 19, 18, 15, 16
		D.	12, 16, 13, 15, 19, 16, 19
		Hint
	10.	The mean of a set of normally distributed data is 65 and the standard deviation is 13. Find the value that defines the 75th percentile.
		A.	74.1	B.	75
		C.	72.6	D.	75.8
		Hint