C207 Data-Driven Decision Making Pre-Test
Self Assessment questions with solved
solutions
If you were to take your temperature 10 times in a row using the same thermometer and got
the same result every time, you could say that the thermometer is __________. -
ANSWER>>reliable
A test is Reliable if it is consistent and repeatable. - ANSWER>>True
According to the 2000 census the average number of people in a family in the U.S. was 3.17.
Since it isn't possible to have .17 of a person, you would use a __________ data point to
describe the number of people in your family. - ANSWER>>discrete
You would use a Discrete number such as one, three, or five to describe the number of people
in your family. - ANSWER>>True
You survey 100 New Yorkers about their preference for New York-style or Chicago-style pizza.
What would be wrong with this? - ANSWER>>You would encounter measurement bias.
Asking 100 New Yorkers about their pizza preferences would most likely result in measurement
bias. The same would occur if you were to ask the question of 100 Chicagoans. -
ANSWER>>True
Rankings are an example of which kind of data? - ANSWER>>ordinal
Ordinal numbers place subjects in order according to some quality. So, if you came in first,
second, or third in a race, this would be an example of ordinal data. - ANSWER>>True
The science of using mathematical procedures to describe data is __________. -
ANSWER>>statistics
Statistics uses mathematical procedures to describe data. Analytics makes use of statistical
analysis. - ANSWER>>True
,The third stage of Davenport and Kim's Three-Stage Model of quantitative decision making is
which of the following? - ANSWER>>communicating results
Cleaning and organizing collected raw data refers to which of the following? - ANSWER>>data
management
Cleaning and organizing raw data is known as data management. The result is sometimes a
rectangular data file. - ANSWER>>True
Suppose you wanted to determine the ratio of cyclists to drivers in cities with higher versus
lower air quality. What kind of study might you use? - ANSWER>>observational study
Suppose you were to use analytics in an experiment to determine how many salespeople to
assign to particular sales territories based on the makeup and performance of the territories in
the results of the experiment. You would be using which kind of analytics? -
ANSWER>>prescriptive
Because you cannot control for all variables, you would not be able to use an experimental
study or blind studies. - ANSWER>>True
Prescriptive analytics determines a course of action - ANSWER>>True
Suppose you employed analytics to determine which sales territories had shown the most
profitable growth in the last four quarters and would most likely do so again in the future. You
would be using which kind of analytics? - ANSWER>>predictive
Using past information to make decisions about the future is called predictive analytics. -
ANSWER>>True
Of the following, which is considered the most serious kind of data error? - ANSWER>>missing
data
Missing data can severely compromise the results of your study. - ANSWER>>True
If you designed a drug trial in which the subject, the data gatherer, and the treatment allocator
did not know who was in the control group, then you created a __________ study. -
ANSWER>>triple-blind
, A study where all parties do not know who is in the control group and who is in the treatment
group is a triple-blind study. If the treatment allocator and data gatherer are the same person,
this would be a double-blind study. - ANSWER>>True
Suppose you were making a simplified representation of a complex problem in order to solve it,
which stage of the Three Stage Model would you be in? - ANSWER>>solving the problem
The modeling step is part of the solving the problem stage. - ANSWER>>True
Assume you are measuring the various returns on investment, over the past year, for four
different stocks in your portfolio. You find the following values (each as a percent of your
investment): 4.68, 5.65, 3.78, -0.46, 6.91. What kind of data are these data points? -
ANSWER>>continuous data
In a set of continuous data, a point can lay along any point in a range of data. - ANSWER>>True
If you were to take your temperature 10 times in a row using the same thermometer and get
the following results (in degrees Fahrenheit), what could you assume about the thermometer?
34, 99, 108, 45, 66, 21, 78, 53, 94, 102 - ANSWER>>It is neither reliable nor valid.
Which of the following is NOT an application of statistics in business? - ANSWER>>Forecast
likelihood of board of director decisions from previous voting habits.
Which of the following is an example of statistics being applied to healthcare? -
ANSWER>>Caroline determines the likelihood of a false positive for the cancer treatment she
invented based on previous results.
Bethany notices that her husband is wearing a blue sweater on Tuesday. She cannot remember
what he has worn previous Tuesdays. The next Tuesday she notices he is wearing another blue
sweater. She concludes that if it is Tuesday, he will wear a blue sweater having data from her
experiment to support this. What is the flaw with this experiment? - ANSWER>>Small Sample
Size
Doctor Andrews has been trying to measure the likelihood of heart attack risk. Doctor Andrews
decides to monitor hair length in people to determine those at high risk of heart attack. What is
the flaw in this experiment? - ANSWER>>Operationalization
Self Assessment questions with solved
solutions
If you were to take your temperature 10 times in a row using the same thermometer and got
the same result every time, you could say that the thermometer is __________. -
ANSWER>>reliable
A test is Reliable if it is consistent and repeatable. - ANSWER>>True
According to the 2000 census the average number of people in a family in the U.S. was 3.17.
Since it isn't possible to have .17 of a person, you would use a __________ data point to
describe the number of people in your family. - ANSWER>>discrete
You would use a Discrete number such as one, three, or five to describe the number of people
in your family. - ANSWER>>True
You survey 100 New Yorkers about their preference for New York-style or Chicago-style pizza.
What would be wrong with this? - ANSWER>>You would encounter measurement bias.
Asking 100 New Yorkers about their pizza preferences would most likely result in measurement
bias. The same would occur if you were to ask the question of 100 Chicagoans. -
ANSWER>>True
Rankings are an example of which kind of data? - ANSWER>>ordinal
Ordinal numbers place subjects in order according to some quality. So, if you came in first,
second, or third in a race, this would be an example of ordinal data. - ANSWER>>True
The science of using mathematical procedures to describe data is __________. -
ANSWER>>statistics
Statistics uses mathematical procedures to describe data. Analytics makes use of statistical
analysis. - ANSWER>>True
,The third stage of Davenport and Kim's Three-Stage Model of quantitative decision making is
which of the following? - ANSWER>>communicating results
Cleaning and organizing collected raw data refers to which of the following? - ANSWER>>data
management
Cleaning and organizing raw data is known as data management. The result is sometimes a
rectangular data file. - ANSWER>>True
Suppose you wanted to determine the ratio of cyclists to drivers in cities with higher versus
lower air quality. What kind of study might you use? - ANSWER>>observational study
Suppose you were to use analytics in an experiment to determine how many salespeople to
assign to particular sales territories based on the makeup and performance of the territories in
the results of the experiment. You would be using which kind of analytics? -
ANSWER>>prescriptive
Because you cannot control for all variables, you would not be able to use an experimental
study or blind studies. - ANSWER>>True
Prescriptive analytics determines a course of action - ANSWER>>True
Suppose you employed analytics to determine which sales territories had shown the most
profitable growth in the last four quarters and would most likely do so again in the future. You
would be using which kind of analytics? - ANSWER>>predictive
Using past information to make decisions about the future is called predictive analytics. -
ANSWER>>True
Of the following, which is considered the most serious kind of data error? - ANSWER>>missing
data
Missing data can severely compromise the results of your study. - ANSWER>>True
If you designed a drug trial in which the subject, the data gatherer, and the treatment allocator
did not know who was in the control group, then you created a __________ study. -
ANSWER>>triple-blind
, A study where all parties do not know who is in the control group and who is in the treatment
group is a triple-blind study. If the treatment allocator and data gatherer are the same person,
this would be a double-blind study. - ANSWER>>True
Suppose you were making a simplified representation of a complex problem in order to solve it,
which stage of the Three Stage Model would you be in? - ANSWER>>solving the problem
The modeling step is part of the solving the problem stage. - ANSWER>>True
Assume you are measuring the various returns on investment, over the past year, for four
different stocks in your portfolio. You find the following values (each as a percent of your
investment): 4.68, 5.65, 3.78, -0.46, 6.91. What kind of data are these data points? -
ANSWER>>continuous data
In a set of continuous data, a point can lay along any point in a range of data. - ANSWER>>True
If you were to take your temperature 10 times in a row using the same thermometer and get
the following results (in degrees Fahrenheit), what could you assume about the thermometer?
34, 99, 108, 45, 66, 21, 78, 53, 94, 102 - ANSWER>>It is neither reliable nor valid.
Which of the following is NOT an application of statistics in business? - ANSWER>>Forecast
likelihood of board of director decisions from previous voting habits.
Which of the following is an example of statistics being applied to healthcare? -
ANSWER>>Caroline determines the likelihood of a false positive for the cancer treatment she
invented based on previous results.
Bethany notices that her husband is wearing a blue sweater on Tuesday. She cannot remember
what he has worn previous Tuesdays. The next Tuesday she notices he is wearing another blue
sweater. She concludes that if it is Tuesday, he will wear a blue sweater having data from her
experiment to support this. What is the flaw with this experiment? - ANSWER>>Small Sample
Size
Doctor Andrews has been trying to measure the likelihood of heart attack risk. Doctor Andrews
decides to monitor hair length in people to determine those at high risk of heart attack. What is
the flaw in this experiment? - ANSWER>>Operationalization
