Statistical Data Literacy - D772 Pretest
UPDATED ACTUAL Exam Questions and
CORRECT Answers
What is one example of a sample from a research study? - CORRECT ANSWER - A set
of 100 randomly collected bees from a hive
What is one example of an individual in an allergy treatment study? - CORRECT
ANSWER - A patient who is part of the study
To determine customer product preferences, a clothing company uses a computer to fairly select
100 of its customers to participate in an interview. What is the sampling method described in this
situation? - CORRECT ANSWER - Simple random
What is the advantage of using simple random sampling? - CORRECT ANSWER - It is
the most straightforward and effective way to produce data that is likely to be representative of
the population.
What is one example of an experiment? - CORRECT ANSWER - To measure the effect of
light on attention span, researchers recruit participants and randomly assign them to two rooms,
one with artificial light and the other with natural light.
What role does the researcher play in an experiment? - CORRECT ANSWER -
Manipulate variables and observe the effects
What is an example of a control group? - CORRECT ANSWER - In a study on a new
plant fertilizer, those not receiving the fertilizer
The director of campus food services at a university wants to study the food preferences of
students on campus. They place phone calls to 500 random students that span the grade levels.
What is the sample in this study? - CORRECT ANSWER - Students called by the director
, What is one implication of using a representative sample? - CORRECT ANSWER - The
sample provides reliable data that can be generalized to the larger population with confidence.
What is one situation that shows a sampling frame error? - CORRECT ANSWER - To
obtain information on preferences on movies being shown at a small theater, the owner asked for
input from all customers that visited the theater on Monday or Tuesday of a given week.
Which example illustrates a perceived lack of anonymity? - CORRECT ANSWER -A
coach hands out a survey asking players to evaluate the quality of coaching and collects the
survey from them on their way out of practice.
When conducting a survey about the preference of print magazines over digital magazines, the
research firm calls a completely random list of 500 individuals, with 23 people answering the
call. What is the type of bias illustrated in this situation? - CORRECT ANSWER - Non-
response bias
A retailer hands out hundreds of customer satisfaction surveys on pre-paid postcards, and by the
deadline 26 people had mailed the survey in. What is illustrated in this scenario? - CORRECT
ANSWER - A retailer hands out hundreds of customer satisfaction surveys on pre-paid
postcards, and by the deadline 26 people had mailed the survey in. What is illustrated in this
scenario?
What is one situation that shows a perceived lack of anonymity? - CORRECT ANSWER -
The president of a marketing firm emails a survey to senior executives on how well the company
is being led, and they are asked to send it back to the president's administrative assistant.
A scientist is designing an experiment to test a hypothesis. Which practice should be avoided to
ensure that data is not misleading? - CORRECT ANSWER - Changing measuring
instruments without reporting it
A retail store owner analyzed sales data to determine that soccer ball sales and t-shirt sales
increase and decrease together. The store owner knows that people who play soccer wear t-shirts,
so they conclude that increased t-shirt sales are caused when people buy more soccer balls. Is
UPDATED ACTUAL Exam Questions and
CORRECT Answers
What is one example of a sample from a research study? - CORRECT ANSWER - A set
of 100 randomly collected bees from a hive
What is one example of an individual in an allergy treatment study? - CORRECT
ANSWER - A patient who is part of the study
To determine customer product preferences, a clothing company uses a computer to fairly select
100 of its customers to participate in an interview. What is the sampling method described in this
situation? - CORRECT ANSWER - Simple random
What is the advantage of using simple random sampling? - CORRECT ANSWER - It is
the most straightforward and effective way to produce data that is likely to be representative of
the population.
What is one example of an experiment? - CORRECT ANSWER - To measure the effect of
light on attention span, researchers recruit participants and randomly assign them to two rooms,
one with artificial light and the other with natural light.
What role does the researcher play in an experiment? - CORRECT ANSWER -
Manipulate variables and observe the effects
What is an example of a control group? - CORRECT ANSWER - In a study on a new
plant fertilizer, those not receiving the fertilizer
The director of campus food services at a university wants to study the food preferences of
students on campus. They place phone calls to 500 random students that span the grade levels.
What is the sample in this study? - CORRECT ANSWER - Students called by the director
, What is one implication of using a representative sample? - CORRECT ANSWER - The
sample provides reliable data that can be generalized to the larger population with confidence.
What is one situation that shows a sampling frame error? - CORRECT ANSWER - To
obtain information on preferences on movies being shown at a small theater, the owner asked for
input from all customers that visited the theater on Monday or Tuesday of a given week.
Which example illustrates a perceived lack of anonymity? - CORRECT ANSWER -A
coach hands out a survey asking players to evaluate the quality of coaching and collects the
survey from them on their way out of practice.
When conducting a survey about the preference of print magazines over digital magazines, the
research firm calls a completely random list of 500 individuals, with 23 people answering the
call. What is the type of bias illustrated in this situation? - CORRECT ANSWER - Non-
response bias
A retailer hands out hundreds of customer satisfaction surveys on pre-paid postcards, and by the
deadline 26 people had mailed the survey in. What is illustrated in this scenario? - CORRECT
ANSWER - A retailer hands out hundreds of customer satisfaction surveys on pre-paid
postcards, and by the deadline 26 people had mailed the survey in. What is illustrated in this
scenario?
What is one situation that shows a perceived lack of anonymity? - CORRECT ANSWER -
The president of a marketing firm emails a survey to senior executives on how well the company
is being led, and they are asked to send it back to the president's administrative assistant.
A scientist is designing an experiment to test a hypothesis. Which practice should be avoided to
ensure that data is not misleading? - CORRECT ANSWER - Changing measuring
instruments without reporting it
A retail store owner analyzed sales data to determine that soccer ball sales and t-shirt sales
increase and decrease together. The store owner knows that people who play soccer wear t-shirts,
so they conclude that increased t-shirt sales are caused when people buy more soccer balls. Is
