WGU D772 STATISTICAL DATA OBJECTIVE
ASSESSMENT EXAM ACTUAL CORRECT
QUESTIONS AND VERIFIED DETAILED
ANSWERS| CURRENTLY TESTING VERSION |
ALREADY GRADED A+|NEWEST|EXPERT
VERIFIED FOR GUARANTEED PASS 2026/2027
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?
Students called by the director
What is one implication of using a representative sample?
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?
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?
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?
Non-response bias
1|Page
,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?
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?
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 this a valid conclusion?
No, because a confounding variable is a possible cause.
A researcher collected data on 2,000 college students, finding that students who
regularly consume caffeine are 20% more likely to have a GPA over 3.0. What is the valid
conclusion, based on the study?
There is an association between the variables, but causation cannot be determined.
A person recorded the brand of shoes worn by each participant in a race. What is the
correct classification of the collected data?
Categorical
For each plant in an experiment, a scientist recorded the height of the plant in
centimeters. How is the collected data classified?
Quantitative
A student is designing a survey to collect data for a project. Which survey question will
result in quantitative data?
2|Page
,How much sleep do you get each night?
A psychologist randomly split the participants of an experiment into four groups. Each
participant was given a maze to solve, but the maze lines were a different color for each
group. Each participant was given a score for how long it took them to solve the maze.
What is the explanatory variable in this experiment?
The specific maze color
A company wants to create a graphical display to show the percentage of employees
who are in each of six departments. What is an appropriate graphical display for this
data?
Pie chart
The teacher of a free art class has the ages of the twelve students and wants to see the
distribution of the ages. Which graphical display is appropriate to visualize the
distribution of data?
Stem-and-leaf plot
A teacher gave 105 students an exam. Each student received a score between 0 and
100. The teacher wants to see the distribution of scores. Which type of graphical display
is appropriate to show the data?
Histogram
A movie theater employee recorded data on the people attending each of four movies
playing at the same time. For each person, the employee recorded the movie the person
watched and whether or not the person made a purchase from the concession stand.
Which graphical display is appropriate to visualize the distribution of data?
Two-way table
What is the mean of the following set of numbers: {41, 22, 43, 36, 42, 41, 37, 32, 39}?
37
What is the mode of the following set of numbers: {54, 65, 63, 48, 65, 61, 51, 67, 70, 66}?
3|Page
, 65
There are eight cards in a set. They are numbered 1, 2, 3, 4, 5, 6, 7, and 8. A player pulls
one card at random and checks to see if the result is less than 3. If so, the player wins.
What does 1/4 represent in this scenario?
Probability of winning
Six cards each have their own color: green, red, yellow, black, white, and gray. The deck
is shuffled, and a person is given the chance to pull one random card. If it is a color that
is not black, not white, and not gray, the person wins a prize. Which term describes 36
for this situation?
Probability of winning
Which value could represent the probability of an event?
0.01
What characterizes a player's thought about an upcoming game if they believe that the
probability of winning is 83/100?
The player believes it is likely that the team will win.
There are 6 pizza toppings on a menu: pepperoni, sausage, onions, green peppers,
bacon, and pineapple. What is the theoretical probability that a randomly chosen pizza
topping will be pepperoni or bacon?
1/3
Which situation describes dependent events?
A deck of cards has cards numbered 1 to 10. One card is drawn, and then a second card
is drawn without replacing the first one. Event A is, "a card with an even number on it is
drawn first," and event B is, "a card with an odd number on it is drawn second."
Which situation describes a scenario in which event A will not influence event B?
Two unrelated people in different places randomly pull a pair of socks from their own
drawer containing a variety of colors, including some that are white and some that are
4|Page
ASSESSMENT EXAM ACTUAL CORRECT
QUESTIONS AND VERIFIED DETAILED
ANSWERS| CURRENTLY TESTING VERSION |
ALREADY GRADED A+|NEWEST|EXPERT
VERIFIED FOR GUARANTEED PASS 2026/2027
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?
Students called by the director
What is one implication of using a representative sample?
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?
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?
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?
Non-response bias
1|Page
,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?
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?
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 this a valid conclusion?
No, because a confounding variable is a possible cause.
A researcher collected data on 2,000 college students, finding that students who
regularly consume caffeine are 20% more likely to have a GPA over 3.0. What is the valid
conclusion, based on the study?
There is an association between the variables, but causation cannot be determined.
A person recorded the brand of shoes worn by each participant in a race. What is the
correct classification of the collected data?
Categorical
For each plant in an experiment, a scientist recorded the height of the plant in
centimeters. How is the collected data classified?
Quantitative
A student is designing a survey to collect data for a project. Which survey question will
result in quantitative data?
2|Page
,How much sleep do you get each night?
A psychologist randomly split the participants of an experiment into four groups. Each
participant was given a maze to solve, but the maze lines were a different color for each
group. Each participant was given a score for how long it took them to solve the maze.
What is the explanatory variable in this experiment?
The specific maze color
A company wants to create a graphical display to show the percentage of employees
who are in each of six departments. What is an appropriate graphical display for this
data?
Pie chart
The teacher of a free art class has the ages of the twelve students and wants to see the
distribution of the ages. Which graphical display is appropriate to visualize the
distribution of data?
Stem-and-leaf plot
A teacher gave 105 students an exam. Each student received a score between 0 and
100. The teacher wants to see the distribution of scores. Which type of graphical display
is appropriate to show the data?
Histogram
A movie theater employee recorded data on the people attending each of four movies
playing at the same time. For each person, the employee recorded the movie the person
watched and whether or not the person made a purchase from the concession stand.
Which graphical display is appropriate to visualize the distribution of data?
Two-way table
What is the mean of the following set of numbers: {41, 22, 43, 36, 42, 41, 37, 32, 39}?
37
What is the mode of the following set of numbers: {54, 65, 63, 48, 65, 61, 51, 67, 70, 66}?
3|Page
, 65
There are eight cards in a set. They are numbered 1, 2, 3, 4, 5, 6, 7, and 8. A player pulls
one card at random and checks to see if the result is less than 3. If so, the player wins.
What does 1/4 represent in this scenario?
Probability of winning
Six cards each have their own color: green, red, yellow, black, white, and gray. The deck
is shuffled, and a person is given the chance to pull one random card. If it is a color that
is not black, not white, and not gray, the person wins a prize. Which term describes 36
for this situation?
Probability of winning
Which value could represent the probability of an event?
0.01
What characterizes a player's thought about an upcoming game if they believe that the
probability of winning is 83/100?
The player believes it is likely that the team will win.
There are 6 pizza toppings on a menu: pepperoni, sausage, onions, green peppers,
bacon, and pineapple. What is the theoretical probability that a randomly chosen pizza
topping will be pepperoni or bacon?
1/3
Which situation describes dependent events?
A deck of cards has cards numbered 1 to 10. One card is drawn, and then a second card
is drawn without replacing the first one. Event A is, "a card with an even number on it is
drawn first," and event B is, "a card with an odd number on it is drawn second."
Which situation describes a scenario in which event A will not influence event B?
Two unrelated people in different places randomly pull a pair of socks from their own
drawer containing a variety of colors, including some that are white and some that are
4|Page
