WGU C207 DATA DRIVEN UPDATED
COMPREHENSIVE EXAM QUESTIONS AND ANSWERS
SURE A+
✔✔Confusion of association and causality - ✔✔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?
✔✔Does a causal relationship truly exist? - ✔✔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?
✔✔Intersection
Multiplication principle - ✔✔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
✔✔Bayes' Theorem - ✔✔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 part if they
purchase a plumbing part.
Given this information, 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?
✔✔12 - ✔✔Given the following data set:
9 12 14 10 8 11 12
What is the mode?
✔✔Scatterplot - ✔✔Which graphical tool is used to illustrate a possible relationship or
correlation between two variables?
✔✔The data point is two standard deviations less than the mean of the data set -
✔✔What does it mean when an individual data point has a z-score of -2?
✔✔The advertisement was effective in building brand awareness. - ✔✔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 with 95% confidence.
What can be concluded from this study?
✔✔Median - ✔✔A manager is analyzing a dataset that includes information on
individual incomes. The manager knows that the dataset is fairly representative of the
general population and includes several millionaires.
Based on this dataset, which measure of central tendency best represents the middle of
the distribution?
✔✔Standard deviation - ✔✔After evaluating manufacturing times for a particular
product, a manager determines that the times are spread out across the distribution.
The manager has been asked to determine how far, on average, the time is from the
mean.
COMPREHENSIVE EXAM QUESTIONS AND ANSWERS
SURE A+
✔✔Confusion of association and causality - ✔✔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?
✔✔Does a causal relationship truly exist? - ✔✔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?
✔✔Intersection
Multiplication principle - ✔✔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
✔✔Bayes' Theorem - ✔✔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 part if they
purchase a plumbing part.
Given this information, 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?
✔✔12 - ✔✔Given the following data set:
9 12 14 10 8 11 12
What is the mode?
✔✔Scatterplot - ✔✔Which graphical tool is used to illustrate a possible relationship or
correlation between two variables?
✔✔The data point is two standard deviations less than the mean of the data set -
✔✔What does it mean when an individual data point has a z-score of -2?
✔✔The advertisement was effective in building brand awareness. - ✔✔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 with 95% confidence.
What can be concluded from this study?
✔✔Median - ✔✔A manager is analyzing a dataset that includes information on
individual incomes. The manager knows that the dataset is fairly representative of the
general population and includes several millionaires.
Based on this dataset, which measure of central tendency best represents the middle of
the distribution?
✔✔Standard deviation - ✔✔After evaluating manufacturing times for a particular
product, a manager determines that the times are spread out across the distribution.
The manager has been asked to determine how far, on average, the time is from the
mean.
