MATH 120 INTRO TO STATISTICS FREQUENTLY TESTED
ACTUAL EXAM QUESTIONS WITH CORRECT ANSWERS
Question 1.
Match each word or phrase
ANSWER
A numerical summary of a sample. Statistic.
Organizing and summarizing data through tables, graphs, and numerical summaries.
Descriptive Statistics.
The science of collecting, organizing, summarizing, and analyzing information to draw
conclusions or answer questions. It is also about providing a measure of confidence in any
conclusions. Statistics.
A subset of the group of individuals that is being studied. Sample.
Uses methods that take results from a sample and extends them to the population, and
measures the reliability of the result. Inferential Statistics
A person or object that is a member of the group being studied. Individual
A numerical summary of a population. Parameter.
The entire group of individuals to be studied. Population
Question 2.
Match each word or phrase
ANSWER
Provide numerical measures of individuals. The measures can be added or subtracted, and
provide meaningful results. Quantitative Variable
Allow for classification of individuals based on some attribute or characteristic. Qualitative
Variable
The characteristics of the individuals within the population. Variable
Information that describes characteristics of an individual. Data
Has either a finite number of possible values or countable number of possible values. The
values of these variables typically result from counting. Discrete Variable
Has an infinite number of possible values that are not countable. The values of these variables
typically result from measurement. Continuous Variable
,Question 3.
Number of pets
ANSWER
Is the variable qualitative or quantitative?
The variable is quantitative because it is a numerical measure.
Question 4.
Time to swim 100 meters
ANSWER
Is the variable qualitative or quantitative?
The variable is quantitative because it is a numerical measure.
Question 5.
Number of beats in a song
ANSWER
Is the variable qualitative or quantitative?
The variable is discrete because it is countable.
Question 6.
Distance between sides of a street
ANSWER
Is the variable qualitative or quantitative?
The variable is continuous because it is not countable.
Question 7.
The rankings of songs in the top 100
ANSWER
ordinal
, Question 8.
Dress color
ANSWER
nominal
Question 9.
Ages of children
ANSWER
Ratio
Question 10.
The data on the right relate to characteristics of high-definition televisions A through E. Identify the
individuals, variables, and data corresponding to the variables. Determine whether each variable is
qualitative, continuous, or discrete.
ANSWER
What are the individuals being studied?
(A) The high-definition television setups A through E.
What are the variables and their corresponding data being studied?
(A) Size (42 , 54 , 40 , 40 , 44 ), screen type (Projection , Plasma , Plasma , Projection, Plasma ),
and number of channels available (300 , 107 , 423 , 270 , 290 )
Determine whether each variable is qualitative, continuous, or discrete.
Size is a continuous variable. Screen type is a qualitative variable. Number of channels
available is a discrete variable.
ACTUAL EXAM QUESTIONS WITH CORRECT ANSWERS
Question 1.
Match each word or phrase
ANSWER
A numerical summary of a sample. Statistic.
Organizing and summarizing data through tables, graphs, and numerical summaries.
Descriptive Statistics.
The science of collecting, organizing, summarizing, and analyzing information to draw
conclusions or answer questions. It is also about providing a measure of confidence in any
conclusions. Statistics.
A subset of the group of individuals that is being studied. Sample.
Uses methods that take results from a sample and extends them to the population, and
measures the reliability of the result. Inferential Statistics
A person or object that is a member of the group being studied. Individual
A numerical summary of a population. Parameter.
The entire group of individuals to be studied. Population
Question 2.
Match each word or phrase
ANSWER
Provide numerical measures of individuals. The measures can be added or subtracted, and
provide meaningful results. Quantitative Variable
Allow for classification of individuals based on some attribute or characteristic. Qualitative
Variable
The characteristics of the individuals within the population. Variable
Information that describes characteristics of an individual. Data
Has either a finite number of possible values or countable number of possible values. The
values of these variables typically result from counting. Discrete Variable
Has an infinite number of possible values that are not countable. The values of these variables
typically result from measurement. Continuous Variable
,Question 3.
Number of pets
ANSWER
Is the variable qualitative or quantitative?
The variable is quantitative because it is a numerical measure.
Question 4.
Time to swim 100 meters
ANSWER
Is the variable qualitative or quantitative?
The variable is quantitative because it is a numerical measure.
Question 5.
Number of beats in a song
ANSWER
Is the variable qualitative or quantitative?
The variable is discrete because it is countable.
Question 6.
Distance between sides of a street
ANSWER
Is the variable qualitative or quantitative?
The variable is continuous because it is not countable.
Question 7.
The rankings of songs in the top 100
ANSWER
ordinal
, Question 8.
Dress color
ANSWER
nominal
Question 9.
Ages of children
ANSWER
Ratio
Question 10.
The data on the right relate to characteristics of high-definition televisions A through E. Identify the
individuals, variables, and data corresponding to the variables. Determine whether each variable is
qualitative, continuous, or discrete.
ANSWER
What are the individuals being studied?
(A) The high-definition television setups A through E.
What are the variables and their corresponding data being studied?
(A) Size (42 , 54 , 40 , 40 , 44 ), screen type (Projection , Plasma , Plasma , Projection, Plasma ),
and number of channels available (300 , 107 , 423 , 270 , 290 )
Determine whether each variable is qualitative, continuous, or discrete.
Size is a continuous variable. Screen type is a qualitative variable. Number of channels
available is a discrete variable.
