1.	Below are listed the ages (in months) of children at a home day care.  Choose the correct stemplot of the data.  
 
18, 24, 25, 35, 37, 42, 47, 48, 48, 58

2.	Below are listed the numbers of children in the classrooms of a small elementary school. Choose the correct stemplot of the data.
 
12, 14, 20, 21, 21, 25, 27, 30, 30, 30

3.	Given the stemplot below, which description is true?

A)	There are no outliers on the stemplot.	
B)	The numbers 29 and 75 are outliers on the stemplot.	
C)	The number 75 is the only outlier on the stemplot.	
D)	The number 60 is the only outlier on the stemplot.	

4.	Given the stemplot below, which description is true?

A)	There are no outliers on the stemplot.	
B)	The number 29 is the only outlier on the stemplot.	
C)	The numbers 29 and 75 are the only outliers on the stemplot.	
D)	The number 75 is the only outlier on the stemplot.	

5.	Given the stemplot below, which description is true?

A)	There are no outliers on the stemplot.	
B)	The number 9 is the only outlier on the stemplot.	
C)	The numbers 9 and 50 are the only outliers on the stemplot.	
D)	The number 50 is the only outlier on the stemplot.	

6.	Below is a histogram of waiting times for patients at a health clinic.  How many patients waited between 20 and 29 minutes?

	A)  2    B)  3    C)  6    D)  8	

7.	Given the histogram below of waiting times for patients at a health clinic, which statement must be true?

A)	There are no gaps in the histogram.	
B)	Eight patients waited exactly 35 minutes.	
C)	Two patients were seen immediately on arrival at the clinic.	
D)	More patients waited longer than one-half hour than those who waited less than one-half hour.	

8.	Given the histogram of waiting times for patients at a health clinic, which statement is true?

A)	The histogram is roughly symmetric.	
B)	The class from 50 to 59 minutes represents 10 outliers.	
C)	There is a gap in the histogram.	
D)	The histogram is skewed to the right.	

9.	Below is a histogram of the ages of people attending a concert.  Which statement is true?

A)	The histogram is roughly symmetric.	
B)	There is a gap in the histogram.	
C)	The histogram is skewed to the right.	
D)	The center of the distribution is at about age 50.	

10.	Given the histogram below, which statement is true?

A)	The histogram has an outlier between 400 and 500.	
B)	The histogram is skewed to the right.	
C)	The histogram is symmetric.	
D)	The histogram has a gap between 400 and 500.	

11.	Given the histogram below, which statement is true?

A)	The histogram has a gap.	C)	The histogram is skewed to the right.	
B)	There is an outlier at 100.	D)	The histogram is roughly symmetric.	

12.	Below are the ages of 15 students in a college class.  Find the median age.

27, 50, 33, 25, 86, 25, 85, 31, 37, 44, 20, 36, 59, 34, 28 	

	A)  34    B)  31    C)  41.3    D)  20.6	

13.	Below are the ages of 15 students in a college class.  Find the mean age.

27, 50, 33, 25, 86, 25, 85, 31, 37, 44, 20, 36, 59, 34, 28 	

	A)  34    B)  31    C)  41.3    D)  20.6	

14.	Below are the ages of 15 students in a college class.  Find the standard deviation of the ages.

27, 50, 33, 25, 86, 25, 85, 31, 37, 44, 20, 36, 59, 34, 28 	

	A)  26.4    B)  20.6    C)  19.9    D)  4.5	

15.	Below are the ages of 15 students in a college class.  Find the first quartile of the ages.

27, 50, 33, 25, 86, 25, 85, 31, 37, 44, 20, 36, 59, 34, 28 	

	A)  20    B)  25    C)  27    D)  50	

16.	Below are the heights (in inches) of students in a third-grade class.  Find the mean height.

39, 37, 48, 49, 40, 42, 48, 53, 47, 42, 49, 51, 52, 45, 47, 48 	

	A)  47.5    B)  50    C)  46.0625    D)  47	

17.	Below are the heights (in inches) of students in a third-grade class.  Find the median height.

39, 37, 48, 49, 40, 42, 48, 53, 47, 42, 49, 51, 52, 45, 47, 48 	

	A)  47.5    B)  50    C)  46.0625    D)  47	

18.	Below is a list of the number of dogs owned by families in a particular neighborhood:
 
4, 3, 7, 1, 5, 1, 2, 9, 0, 3
 
What is the mean number of dogs owned?	
	A)  2.7    B)  3    C)  3.5    D)  3.9	

19.	Below is a list of the number of dogs owned by families in a particular neighborhood:
 
4, 3, 7, 1, 5, 1, 2, 9, 0, 3
 
What is the median number of dogs owned?	
	A)  2.7    B)  3    C)  3.5    D)  3.9	

20.	Below is a list of the number of dogs owned by families in a particular neighborhood:
 
 4, 3, 7, 1, 5, 1, 2, 9, 0, 3
 
What is the standard deviation for this data?	
	A)  2.8    B)  5.6    C)  7.3    D)  8.1	

21.	Below is a list of the number of dogs owned by families in a particular neighborhood:
 
4, 3, 7, 1, 5, 1, 2, 9, 0, 3
 
What is the first quartile for this data?	
	A)  0    B)  1    C)  1.5    D)  2	

22.	Below is a list of the number of dogs owned by families in a particular neighborhood:
 
4, 3, 7, 1, 5, 1, 2, 9, 0, 3
 
What is the third quartile for this data?	
	A)  5    B)  6    C)  7    D)  9	

23.	Below is a list of the number of dogs owned by families in a particular neighborhood:
 
 4, 3, 7, 1, 5, 1, 2, 9, 0, 3
 
What is the variance for this data?	
	A)  2.8    B)  5.6    C)  7.3    D)  8.1	

24.	Below are the number of errors made by a typist on various pages of typing.  Find the mean number of errors.

14, 6, 12, 19, 2, 35, 5, 4, 3, 7, 5, 8 	

	A)  6.5    B)  7    C)  9.583    D)  10	

25.	Below are the number of errors made by a typist on various pages of typing.  Find the median number of errors.

14, 6, 12, 19, 2, 35, 5, 4, 3, 7, 5, 8 	

	A)  6.5    B)  7    C)  9.583    D)  10	

26.	Below are the number of errors made by a typist on various pages of typing.  Find the third quartile for the number of errors.

14, 6, 12, 19, 2, 35, 5, 4, 3, 7, 5, 8 	

	A)  5    B)  13    C)  15.5    D)  4.5	

27.	Below are the number of errors made by a typist on various pages of typing.  Find the first quartile for the number of errors.

14, 6, 12, 19, 2, 35, 5, 4, 3, 7, 5, 8 	

	A)  5    B)  13    C)  15.5    D)  4.5	

28.	Given the set of data below, find the mean.

2, 4, 4, 5, 6, 9 	

	A)  4.5    B)  5    C)  7    D)  30	

29.	Given the set of data below, find the median.

2, 4, 4, 5, 6, 9 	

	A)  4.5    B)  5    C)  7    D)  30	

30.	Given the set of data below, find the variance.

2, 4, 4, 5, 6, 9 	

	A)  2.366    B)  4.5    C)  5.6    D)  7	

31.	Given the set of data below, find the standard deviation.

2, 4, 4, 5, 6, 9 	

	A)  2.37    B)  4.5    C)  4.74    D)  5.6	

32.	Given the set of data below, find the mean.

25, 16, 50, 19, 42, 37 	

	A)  34.5    B)  31    C)  31.5    D)  50	

33.	Given the set of data below, find the median.

25, 16, 50, 19, 42, 37 	

	A)  34.5    B)  31    C)  31.5    D)  50	

34.	Given the set of data below, find the variance.

25, 16, 50, 19, 42, 37 	

	A)  184.3    B)  184.6    C)  921.5    D)  923	

35.	Given the set of data below, find the standard deviation.

25, 16, 50, 19, 42, 37 	

	A)  6.07    B)  13.58    C)  184.3    D)  921.5	

36.	Below are the numbers of pages in seven chapters of a textbook.  Find the mean number of pages.

14, 14, 20, 38, 47, 48, 57 	

	A)  34    B)  38    C)  37.33    D)  42.5	

37.	Below are the numbers of pages in seven chapters of a textbook.  Find the median number of pages.

14, 14, 20, 38, 47, 48, 57 	

	A)  34    B)  38    C)  37.33    D)  42.5	

38.	Below are the numbers of pages in seven chapters of a textbook.  Find the variance.

14, 14, 20, 38, 47, 48, 57 	

	A)  312.4    B)  317.67    C)  324    D)  343	

39.	Below are the numbers of pages of seven chapters of a textbook.  Find the standard deviation.

14, 14, 20, 38, 47, 48, 57 	

	A)  18.52    B)  18    C)  17.82    D)  17.67	

40.	Below are the lengths (in minutes) of phone calls made on an 800 line to a business on one day.  Find the five-number summary for this data.

14, 6, 12, 19, 2, 35, 5, 4, 3, 7, 5, 8 	

A)	5, 8, 14, 15.5, 20	C)	2, 4, 6, 12, 19	
B)	2, 4, 7, 14, 35	D)	2, 4.5, 6.5, 13, 35	

41.	Below are the numbers of accidents occurring at a certain corner on 15 consecutive days.  Find the five-number summary of the data.

0, 1, 3, 4, 5, 2, 2, 6, 7, 2, 0, 1, 3, 6, 3 	

	A)  0, 1.5, 3.5, 5.5, 7    B)  0, 1, 3, 5, 7    C)  0, 4, 6, 1, 3    D)  0, 1.5, 3, 5.5, 7	

42.	Below are the scores of 21 students on a history exam.  Find the five-number summary of the scores.

50, 60, 60, 60, 65, 65, 70, 75, 75, 75, 75, 80, 80, 80, 85, 85, 90, 95, 95, 95, 100 	

A)	50, 65, 75, 85, 100	C)	50, 65, 76.9, 87.5, 100	
B)	50, 65, 75, 87.5, 100	D)	50, 65, 77.5, 90, 100	

43.	Which of the following statements about measures of the center of a distribution of data is true?	
A)	Neither the mean nor the median is strongly affected by an outlier in the data.	
B)	The mean is strongly affected by an outlier in the data but the median is not.	
C)	The median is strongly affected by an outlier in the data but the mean is not.	
D)	Both the mean and the median are strongly affected by an outlier in the data.	

44.	Which of the following statements about measures of the spread of data is true?	
A)	Neither the quartiles nor the standard deviation is strongly affected by an outlier in the data.	
B)	The quartiles are strongly affected by an outlier in the data but the standard deviation is not.	
C)	The standard deviation is strongly affected by an outlier in the data but the quartiles are not.	
D)	Both the quartiles and the standard deviation are strongly affected by an outlier in the data.	

45.	Given the histogram below for a set of data, which of the following statements is true?

A)	The five-number summary would describe the data better than the mean and standard deviation.	
B)	The mean and standard deviation would describe the data better than the five-number summary.	
C)	Either the mean and standard deviation or the five-number summary would be equally good to describe the data.	
D)	Neither the mean and standard deviation nor the five-number summary could be used to describe the data.	

46.	Given the histogram below for a set of data, which statement is true?

A)	Either the mean or the median would describe the center of the data well.	
B)	The mean would be a better measure of the center of the data than the median.	
C)	The median would be a better measure of the center of the data than the mean.	
D)	Neither the mean nor the median would be a good measure of the center of the data.	

47.	Given the histogram below for a set of data, which statement is true?

A)	For the set of data shown, the mean and the median are about equal.	
B)	For the set of data shown, the mean is greater than the median.	
C)	For the set of data shown, the median is greater than the mean.	
D)	For the set of data shown, the relationship between the mean and the median cannot be determined.	

48.	Given the histogram below for a set of data, which statement is true?

A)	For the set of data shown, the mean and the median are about equal.	
B)	For the set of data shown, the mean is greater than the median.	
C)	For the set of data shown, the median is greater than the mean.	
D)	For the set of data shown, the relationship between the mean and the median cannot be determined.	

49.	Given the histogram below for a set of data, which statement is true?

A)	For the set of data shown, the mean and the median are about equal.	
B)	For the set of data shown, the mean is greater than the median.	
C)	For the set of data shown, the median is greater than the mean.	
D)	For the set of data shown, the relationship between the mean and the median cannot be determined.	

50.	Below is a list of gas mileage ratings for selected passenger cars in miles per gallon:
 
 53, 43, 89, 41, 85, 86, 91, 92, 95, 94, 86, 102, 114, 30, 123
 
Choose the correct histogram of the data.	
A)		
B)		
C)		
D)		

51.	Below is a list of gas mileage ratings for selected passenger cars in miles per gallon:
 
 53, 43, 89, 41, 85, 86, 91, 92, 95, 94, 86, 102, 114, 30, 123
 
Choose the correct stemplot of the data.	
A)		C)		
B)		D)		

52.	The shelf life of a battery produced by one major company is known to be normally distributed, with a mean life of 3.5 years and a standard deviation of 0.75 years.  What is the upper quartile of battery shelf life?	
	A)  4. years    B)  4.25 years    C)  4.17 years    D)  5.25 years	

53.	The length of students' college careers at Anytown University is known to be normally distributed, with a mean length of 5.5 years and a standard deviation of 1.75 years.  What is the lower quartile for the length of students' careers at Anytown University?	
	A)  4.83 years    B)  3.75 years    C)  4.33 years    D)  2.75 years	

54.	The scores of students on a standardized test form a normal distribution with a mean of 300 and a standard deviation of 40.  What are the lower- and upper-quartile scores for this test?	
	A)  280 and 320    B)  273 and 327    C)  260 and 340    D)  150 and 450	

55.	The mean length of time, per week, that students at a certain school spend on their homework is 24.3 hours, with a standard deviation of 1.2 hours.  Assuming the distribution of study times is normal, what percent of students spend more than 25.1 hours per week on homework?	
	A)  16.5%    B)  5%    C)  12.5%    D)  25%	

56.	The scores of students on a standardized test are normally distributed with a mean of 300 and a standard deviation of 40.  What is the probability that a randomly chosen student scores below 273 on the test?	
A)	approximately 0.025	C)	approximately 0.165	
B)	approximately 0.25	D)	approximately 0.125	

57.	The annual income of residents in a county is $42,000 with a standard deviation of $10,000.  Between what two values do 95% of the incomes of county residents lie?	
A)	$40,000 and $44,000	C)	$32,000 and $52,000	
B)	$22,000 and $62,000	D)	$30,000 and $50,000	

58.	The shelf life of a battery produced by one major company is known to be normally distributed, with a mean life of 3.5 years and a standard deviation of 0.75 years.  What range of years contains 68% of all battery shelf lives?	
	A)  2 to 5 years    B)  2.5 to 4.5 years    C)  2.83 to 4.17 years    D)  2.75 to 4.25	

59.	The scores of students on a standardized test are normally distributed with a mean of 300 and a standard deviation of 40.  Between what two values do 99.7% of the test scores lie?	
	A)  260 to 340    B)  220 to 380    C)  297 to 303    D)  180 to 420	

60.	The mean length of time, per week, that students at a certain school spend on their homework is 24.3 hours, with a standard deviation of 1.4 hours.  Assuming the distribution of study times is normal, what percent of students study between 22.9 and 25.7 hours?	
	A)  99.7%    B)  95%    C)  68%    D)  50%	

61.	The length of students' college careers at Anytown University is known to be normally distributed, with a mean length of 5.5 years and a standard deviation of 1.75 years.  What percent of students have college careers lasting between 2 and 9 years?	
	A)  50%    B)  99.75%    C)  68%    D)  95%	

62.	The shelf life of a battery produced by one major company is known to be normally distributed, with a mean life of 3.5 years and a standard deviation of 0.75 years.  What percent of batteries last between 1.25 and 5.75 years?	
	A)  99.7%    B)  95%    C)  68%    D)  50%	

63.	The annual income of residents in a certain county is normally distributed, with a mean of $42,000 and a standard deviation of $10,000.  What is the probability that a randomly chosen resident has income over $52,000?	
	A)  16%    B)  32%    C)  50%    D)  68%	

64.	The weight of potato chip bags filled by a machine at a packaging plant is normally distributed, with a mean of 15.0 ounces and a standard deviation of 0.2 ounces.  What is the probability that a randomly chosen bag will weigh less than 14.6 ounces?	
	A)  50%    B)  5%    C)  2.5%    D)  2%	

65.	The weight of potato chip bags filled by a machine at a packaging plant is normally distributed, with a mean of 15.0 ounces and a standard deviation of 0.2 ounces.  What is the probability that a randomly chosen bag will weigh more than 15.6 ounces?	
	A)  5%    B)  2.5%    C)  0.3%    D)  0.15%	

66.	The distribution of home prices in Nirvana is skewed to the left. The median price is $167,900.  The mean is	
A)	lower than $167,900.	
B)	greater than $167,900.	
C)	$167,900.	
D)	unable to be determined with this information.	

67.	Bruce is considering relocating to a new city. His options are Altuna, Boundary Valley, and Collie Creek. All other living expenses seem to be equal for the three choices, but Bruce is worried about his heating and cooling bill. The only information he has at his disposal is the following table:
 
 City	
Mean daily	
Standard deviation for	

temperature	
the daily temperature	

Altuna	
64	
15	

Boundary Valley	
64	
16	

Collie Creek	
64	
5	

Which city is likely to have the least expensive heating and cooling costs?	
A)	Altuna	
B)	Boundary Valley	
C)	Collie Creek	
D)	Unable to be determined with this information	

Answer Key

1.	b	
2.	c	
3.	C	
4.	A	
5.	B	
6.	B	
7.	D	
8.	C	
9.	B	
10.	C	
11.	C	
12.	A	
13.	C	
14.	B	
15.	C	
16.	C	
17.	A	
18.	C	
19.	B	
20.	A	
21.	B	
22.	A	
23.	D	
24.	D	
25.	A	
26.	B	
27.	D	
28.	B	
29.	A	
30.	C	
31.	A	
32.	C	
33.	B	
34.	A	
35.	B	
36.	A	
37.	B	
38.	B	
39.	C	
40.	D	
41.	B	
42.	B	
43.	B	
44.	C	
45.	A	
46.	C	
47.	B	
48.	C	
49.	A	
50.	B	
51.	C	
52.	A	
53.	C	
54.	B	
55.	D	
56.	B	
57.	B	
58.	D	
59.	D	
60.	C	
61.	D	
62.	A	
63.	A	
64.	C	
65.	D	
66.	A	
67.	C