WGU C207 Data Driven Decision Making
Quizzes (Latest Update )
Questions with Correct Answers {Grade A}
100% Verified
(Quiz 2) 12. An online marketing organization designed a social media that wants to
earn at least $250,000 in revenue. The campaign will reach 10,000 viewers and receive
orders with a mean of $50 and standard deviation of $10. Which measure should be
used to determine the probability of the campaign receiving at least $250,000?
A) T-statistic
B) Z-score
C) Median
D) R-squared - correct answer B
(Quiz 2) 13. What does it mean when an individual data point has a z-score of +1?
A) The data point is one standard deviation less than the mean of the data set.
,B) The sample standard deviation of the data set is negative.
C) The data point is less than the mean of the data set.
D) The data point is one standard deviation greater than the mean of the data set -
correct answer D
(Quiz 2) 14. A descriptive graph depicting whether there is a correlation or relationship
between two variables, such as car mileage and resale price would be:
A) Histogram
B) Bar chart
C) Scatterplot
D) Pareto chart - correct answer C
(Quiz 2) 15. A food chain finds that there is a strong positive correlation between
average daily sales for their pizza store and the number of daily visits to their website.
,What should be considered before the pizza chain can conclude that the daily sales are
driving the number of visits to their website (or vice versa)?
A) How many days are considered?
B) Is there a causal relationship between sales and site visits?
C) Can we compare sales in dollars to number of visits?
D) Is the central limit theorem applicable? - correct answer B
(Quiz 2) 16. We examine a population with normal distribution having mean of 1000 and
standard deviation 50. What percentage of the population lies between 850 and 1150?
A) 68%
B) 95%
C) 99.7%
D) 100% - correct answer C
(Quiz 2) 17. We examine a population with normal distribution having mean 1000 and
standard deviation 50. What percentage of the population lies between 900 and 1100?
, A) 68%
B) 95%
C) 99.7%
D) 100% - correct answer B
(Quiz 2) 18. How are z-scores from a population with normal distribution distributed?
A) Normal Distribution with mean 0 standard deviation 1
B) Normal Distribution with the same mean and standard deviation
C) Can't be determined
D) Can be determined but none of these answers are correct - correct answer A
(Quiz 2) 20. A stock broker offers two portfolios for his clients. There are various risks
with each portfolio and his is trying to minimize the risk of loss. Both portfolios have
the same mean return.Which measure should the employee use to decide between
these alternatives?
Quizzes (Latest Update )
Questions with Correct Answers {Grade A}
100% Verified
(Quiz 2) 12. An online marketing organization designed a social media that wants to
earn at least $250,000 in revenue. The campaign will reach 10,000 viewers and receive
orders with a mean of $50 and standard deviation of $10. Which measure should be
used to determine the probability of the campaign receiving at least $250,000?
A) T-statistic
B) Z-score
C) Median
D) R-squared - correct answer B
(Quiz 2) 13. What does it mean when an individual data point has a z-score of +1?
A) The data point is one standard deviation less than the mean of the data set.
,B) The sample standard deviation of the data set is negative.
C) The data point is less than the mean of the data set.
D) The data point is one standard deviation greater than the mean of the data set -
correct answer D
(Quiz 2) 14. A descriptive graph depicting whether there is a correlation or relationship
between two variables, such as car mileage and resale price would be:
A) Histogram
B) Bar chart
C) Scatterplot
D) Pareto chart - correct answer C
(Quiz 2) 15. A food chain finds that there is a strong positive correlation between
average daily sales for their pizza store and the number of daily visits to their website.
,What should be considered before the pizza chain can conclude that the daily sales are
driving the number of visits to their website (or vice versa)?
A) How many days are considered?
B) Is there a causal relationship between sales and site visits?
C) Can we compare sales in dollars to number of visits?
D) Is the central limit theorem applicable? - correct answer B
(Quiz 2) 16. We examine a population with normal distribution having mean of 1000 and
standard deviation 50. What percentage of the population lies between 850 and 1150?
A) 68%
B) 95%
C) 99.7%
D) 100% - correct answer C
(Quiz 2) 17. We examine a population with normal distribution having mean 1000 and
standard deviation 50. What percentage of the population lies between 900 and 1100?
, A) 68%
B) 95%
C) 99.7%
D) 100% - correct answer B
(Quiz 2) 18. How are z-scores from a population with normal distribution distributed?
A) Normal Distribution with mean 0 standard deviation 1
B) Normal Distribution with the same mean and standard deviation
C) Can't be determined
D) Can be determined but none of these answers are correct - correct answer A
(Quiz 2) 20. A stock broker offers two portfolios for his clients. There are various risks
with each portfolio and his is trying to minimize the risk of loss. Both portfolios have
the same mean return.Which measure should the employee use to decide between
these alternatives?
