Math 120 Midterm UPDATED Exam
Questions and CORRECT Answers
A ________ is a number that describes a population.
A) statistic
B) summary
C) parameter
D) sample - CORRECT ANSWER -C
Which of the following sample types should you always regard as unreliable?
A) stratified samples
B) cluster samples
C) voluntary response samples
D) simple random samples - CORRECT ANSWER -c
A pollster randomly samples 152 Democrats, 155 Republicans and 17 Independents (all
registered voters) in Metro City and asks each poll participant which mayoral candidate he or she
prefers. Identify the kind of sample that the pollster is using.
A) voluntary response sample
B) stratified sample
C) sample of convenience
D) cluster sample - CORRECT ANSWER -B
By visiting homes door-to-door, a municipality surveys all the households in 102 randomly-
selected neighborhoods to see how residents feel about a proposed property tax increase. Identify
the type of sample that is being used.
,A) systematic sample
B) stratified sample
C) voluntary response sample
D) cluster sample - CORRECT ANSWER -D
The names of all 73 students in a professor's class are written on identical slips of paper, and the
slips are placed into a large glass jar. Then, the professor selects 11 random slips from the jar.
Identify the kind of sample that is being used.
A) sample of convenience
B) systematic sample
C) simple random sample
D) cluster sample - CORRECT ANSWER -C
Determine which of the following describes qualitative data.
i). the volume of a shipping container, in gallons
ii). the name of the material from which the container is made
iii). the shape of the container
A) i and iii only
B) ii and iii only
C) i and ii only
D) i, ii, and iii - CORRECT ANSWER -B
Which one of the following data are discrete?
A) the average preseason ranking of the University of Connecticut's women's basketball team
over the past 10 years
, B) the height of the tallest player on Duke University's men's basketball team
C) the pre-season ranking of Duke University's men's basketball team D) the average height of
players on the University of Connecticut's women's basketball team - CORRECT ANSWER -
C
Determine which of the following describes ordinal data.
i. My best friends are Georgia, Amithaba, and Raphael.
ii. My favorite numbers are 2, 7 and 13.
A) neither i nor ii
B) i only
C) both i and ii
D) ii only - CORRECT ANSWER -A
In a recent poll, 64% of the respondents supported stricter gun laws. Is this an example of
statistic or a parameter?
A) Statistic
B) Parameter - CORRECT ANSWER -A
The following frequency distribution presents the frequency of passenger vehicles that pass
through a certain intersection from 8:00 AM to 9:00 AM on a particular day.
Vehicle Type Frequency
Motorcycle 5
Sedan 71
SUV 87
Truck 35
Questions and CORRECT Answers
A ________ is a number that describes a population.
A) statistic
B) summary
C) parameter
D) sample - CORRECT ANSWER -C
Which of the following sample types should you always regard as unreliable?
A) stratified samples
B) cluster samples
C) voluntary response samples
D) simple random samples - CORRECT ANSWER -c
A pollster randomly samples 152 Democrats, 155 Republicans and 17 Independents (all
registered voters) in Metro City and asks each poll participant which mayoral candidate he or she
prefers. Identify the kind of sample that the pollster is using.
A) voluntary response sample
B) stratified sample
C) sample of convenience
D) cluster sample - CORRECT ANSWER -B
By visiting homes door-to-door, a municipality surveys all the households in 102 randomly-
selected neighborhoods to see how residents feel about a proposed property tax increase. Identify
the type of sample that is being used.
,A) systematic sample
B) stratified sample
C) voluntary response sample
D) cluster sample - CORRECT ANSWER -D
The names of all 73 students in a professor's class are written on identical slips of paper, and the
slips are placed into a large glass jar. Then, the professor selects 11 random slips from the jar.
Identify the kind of sample that is being used.
A) sample of convenience
B) systematic sample
C) simple random sample
D) cluster sample - CORRECT ANSWER -C
Determine which of the following describes qualitative data.
i). the volume of a shipping container, in gallons
ii). the name of the material from which the container is made
iii). the shape of the container
A) i and iii only
B) ii and iii only
C) i and ii only
D) i, ii, and iii - CORRECT ANSWER -B
Which one of the following data are discrete?
A) the average preseason ranking of the University of Connecticut's women's basketball team
over the past 10 years
, B) the height of the tallest player on Duke University's men's basketball team
C) the pre-season ranking of Duke University's men's basketball team D) the average height of
players on the University of Connecticut's women's basketball team - CORRECT ANSWER -
C
Determine which of the following describes ordinal data.
i. My best friends are Georgia, Amithaba, and Raphael.
ii. My favorite numbers are 2, 7 and 13.
A) neither i nor ii
B) i only
C) both i and ii
D) ii only - CORRECT ANSWER -A
In a recent poll, 64% of the respondents supported stricter gun laws. Is this an example of
statistic or a parameter?
A) Statistic
B) Parameter - CORRECT ANSWER -A
The following frequency distribution presents the frequency of passenger vehicles that pass
through a certain intersection from 8:00 AM to 9:00 AM on a particular day.
Vehicle Type Frequency
Motorcycle 5
Sedan 71
SUV 87
Truck 35
