WGU C207 Pre- Assessment Data-Driven Decision-Making Exam (Latest 2023/ 2024 Update) Questions and Verified Answers- 100% Correct
WGU C207 Pre- Assessment Data-Driven
Decision-Making Exam (Latest 2023/ 2024
Update) Questions and Verified Answers100% Correct
Q: 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?
Combination
Multiplication
Conditional probability
Bayes’ theorem
Answer:
Bayes’ theorem
Q: Given the following data set
9, 12, 14, 10, 8, 11, 12
What is the mode? 8
9
11
12
Answer:
12
Q: Which graphical tool is used to illustrate a possible relationship or correlation between two
variables?
Run chart Scatterplot Box plot
Histogram
Answer:
Scatterplot
Q: What does it mean when an individual data point has a z-score of -2? The data point is two
standard deviations less 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 greater than the mean of the data set.
Answer:
The data point is two standard deviations less than the mean of the data set
Q: A research study examined the impact of product advertisement ex- posure 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?
Five percent of the subjects did not like the advertisement
The advertisement was effective in building brand awareness. The advertisement was effective in
increasing sales.
Ninety-five percent of the subjects liked the brand.
Answer:
The advertisement was effective in building brand awareness.
Q: 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 data set, which measure of central tendency best represents the middle of the
distribution?
Median
Mean
Frequency
Mode
Answer:
Median
Q: After evaluating manufacturing times for a particular product, a man- ager 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.
Which statistic roughly measures the average distance of a data point from the mean of the
distribution?
Mode
Standard deviation
Median
Arithmetic mean
Answer:
Standard deviation
Q: The number of customers that an automobile service shop receives on any given day is
normally distributed with a mean of 75 and a standard deviation of 25 On a given day, 125 oil
changes are performed. probability on a given day of 125 or fewer oil changes performe
97.7% 67%
68.5%
99%
Answer:
97.7%
Q: A nonprofit organization ran an e-mail campaign with three different messages to solicit
additional donations. What should the nonprofit organization use to determine if the average
donation differs for the different messages?
Median ANOVA Mean
T-test
Answer:
ANOVA
Q: A manager of a call center is in charge of creating a staffing plan. The number of calls
received per day is normally distributed.
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