WGU D207 DATA DRIVEN DECISION MAKING OA EXAM
AND STUDY GUIDE LATEST 2024 ACTUAL EXAM 500
QUESTIONS AND CORRECT DETAILED |ALREADY GRADED
A+
A researcher concludes that bananas create healthy children because the
researcher's notes indicate that children who eat a banana every day are
healthy.Which misuse of statistics would this study be an example of if
these children also eat a balanced diet and exercise daily?
Unfounded assumptions
Lack of blinding
Faulty operationalization Confusion of association and causality -
ANSWER--Confusion of association and causality
In the month of December, there is a strong positive correlation between
airline ticket sales and retail sales.Which question should the researcher
consider before concluding that the correlation statistic implies that
airline sales drive retail sales?
Does a causal relationship truly exist?
Are the data biased?
Is the sample size large enough?
Does the sample accurately reflect the population? - ANSWER--Does a
causal relationship truly exist?
,A medical care provider determines the probability that a patient needs
treatment for a broken bone, the probability that a patient needs
treatment for a concussion, and the probability that a patient needs
treatment for both a broken bone and a concussion.Which two
techniques apply in finding the probability that a patient needs treatment
for a broken bone and a concussion?Choose 2 answers.
Intersection
Union
Multiplication principle Mutually exclusive - ANSWER--Intersection
Multiplication principle
A hardware store has found that there is a 0.25 probability that a
customer buys an electrical product, a 0.45 probability that a customer
buys a plumbing product, and a 0.10 probability that a customer buys an
electrical product if they purchase a plumbing product.Which statistical
rule can be used to determine the probability that a customer buys a
plumbing product given that this customer has purchased an electrical
product?
Bayes' theorem
Multiplication
Combination
,Conditional probability - ANSWER--Bayes' theorem
Given the following data set:
9, 12, 14, 10, 8, 11, 12
What is the mode?
8
9
11
12 - ANSWER--12
Which graphical tool is used to illustrate a possible relationship or
correlation between two variables?
Run chart
Scatterplot
Box plot
Histogram - ANSWER--Scatterplot
, What does it mean when an individual data point has a z-score of -2?
The data point is greater than the mean of the data set.
The sample standard deviation of the data set is negative.
The data point is equal to the mean of the data set.
The data point is two standard deviations less than the mean of the data
set. - ANSWER--The data point is two standard deviations less than the
mean of the data set.
A research study examined the impact of product advertisement
exposure on that product's brand awareness. The appropriate statistical
test indicates that the null hypothesis should be rejected at the 5%
significance level.What can be concluded from this study?
The advertisement was effective in increasing sales.
The advertisement was effective in building brand awareness.
Five percent of the subjects did not like the advertisement.
Ninety-five percent of the subjects liked the brand. - ANSWER--The
advertisement was effective in building brand awareness.
A manager analyzes a data set that includes information on individual
incomes. The manager knows that the data set is fairly representative of
the general population and includes several millionaires.Based on this
AND STUDY GUIDE LATEST 2024 ACTUAL EXAM 500
QUESTIONS AND CORRECT DETAILED |ALREADY GRADED
A+
A researcher concludes that bananas create healthy children because the
researcher's notes indicate that children who eat a banana every day are
healthy.Which misuse of statistics would this study be an example of if
these children also eat a balanced diet and exercise daily?
Unfounded assumptions
Lack of blinding
Faulty operationalization Confusion of association and causality -
ANSWER--Confusion of association and causality
In the month of December, there is a strong positive correlation between
airline ticket sales and retail sales.Which question should the researcher
consider before concluding that the correlation statistic implies that
airline sales drive retail sales?
Does a causal relationship truly exist?
Are the data biased?
Is the sample size large enough?
Does the sample accurately reflect the population? - ANSWER--Does a
causal relationship truly exist?
,A medical care provider determines the probability that a patient needs
treatment for a broken bone, the probability that a patient needs
treatment for a concussion, and the probability that a patient needs
treatment for both a broken bone and a concussion.Which two
techniques apply in finding the probability that a patient needs treatment
for a broken bone and a concussion?Choose 2 answers.
Intersection
Union
Multiplication principle Mutually exclusive - ANSWER--Intersection
Multiplication principle
A hardware store has found that there is a 0.25 probability that a
customer buys an electrical product, a 0.45 probability that a customer
buys a plumbing product, and a 0.10 probability that a customer buys an
electrical product if they purchase a plumbing product.Which statistical
rule can be used to determine the probability that a customer buys a
plumbing product given that this customer has purchased an electrical
product?
Bayes' theorem
Multiplication
Combination
,Conditional probability - ANSWER--Bayes' theorem
Given the following data set:
9, 12, 14, 10, 8, 11, 12
What is the mode?
8
9
11
12 - ANSWER--12
Which graphical tool is used to illustrate a possible relationship or
correlation between two variables?
Run chart
Scatterplot
Box plot
Histogram - ANSWER--Scatterplot
, What does it mean when an individual data point has a z-score of -2?
The data point is greater than the mean of the data set.
The sample standard deviation of the data set is negative.
The data point is equal to the mean of the data set.
The data point is two standard deviations less than the mean of the data
set. - ANSWER--The data point is two standard deviations less than the
mean of the data set.
A research study examined the impact of product advertisement
exposure on that product's brand awareness. The appropriate statistical
test indicates that the null hypothesis should be rejected at the 5%
significance level.What can be concluded from this study?
The advertisement was effective in increasing sales.
The advertisement was effective in building brand awareness.
Five percent of the subjects did not like the advertisement.
Ninety-five percent of the subjects liked the brand. - ANSWER--The
advertisement was effective in building brand awareness.
A manager analyzes a data set that includes information on individual
incomes. The manager knows that the data set is fairly representative of
the general population and includes several millionaires.Based on this
