WGU C207 Quizes
1. A descriptive graph depicting whether there is a correlation or relationship between two
variables, such as car mileage and resale price would be:: Scat-terplot
2. 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 concludethat the daily sales are driving the number of visits to their
website (or vice versa)?: Is there a causal relationship between sales and site visits?
3. How are z-scores from a population with normal distribution distributed?-
: Normal Distribution with mean 0 standard deviation 1
4. 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 employeeuse to decide between these alternatives?:
Variance
5. A comparison between the effectiveness of online vs. newspaper coupons was conducted
over a 3 month period to see which method brought in greater average revenue per
customer.Which statistic should the pizza manager rec- ommend use to determine promotional
method to use?: T-test
6. Which type of distribution would you expect to see if mean=mode=medi- an?: Normal
distribution
7. Two variables are plotted on a scatterplot and the points on the plot closely follow an upward,
straight line. What is the likely correlation between the twovariables?: Close to 1.0
8. Which of the following statistics are robust to minimize the effect of asingle large outlier?
(More than one answer): Median
Interquartile rangeMode
9. A craftsman builds two kinds of birdhouses. One for bluebirds and one for cardinals. He
knows the amount of labor and the units of lumber that are needed for each birdhouse. The
craftsman has available 60 hours of labor and
120 units of lumber. Which technique should the craftsman use to minimizecost?: Linear
Programming
10. Ski Boards, Inc. wants to enter the market quickly with a new finish on its ski boards. It
has three choices: refurbish the old equipment, make majormodifications or purchase new
equipment. The company has estimated the fixed and variable cost for each option. Which
technique should they use to select the least costly option?: Cross Over
11. Which analysis technique can be used with hypothesis testing when nom-inal or
categorical data is gathered?: Chi-square
, 12. United Motors indicates that gas mileage tests of one of their cars, the Starbird 300, under
city driving conditions has a mean of 30 mph and a medianof 29.9 mph. Which type of
distribution would this testing represent?: Normaldistribution
13. North American Oil Company is attempting to develop a reasonably pricedgasoline that
will deliver improved gasoline mileage. As part of its develop- ment process, the company
would like to compare the effects of three types of gasoline. Which analysis technique should
the company use to compare the performances of each gasoline type?: ANOVA
14. A large manufacturer wants to forecast demand for a piece of pollu-
tion-control equipment. A review of the past 12 months of sales indicates that sales are
increasing. What time series pattern does the sales likely exhibit?: -Trend
15. A car dealership wishes to forecast car sales based upon price discounts and television ads.
What forecasting technique should the dealership use?: -Multiple Regression Analysis
16. A company uses time series analysis to develop its product forecast. Theforecaster uses
simple linear regression but notices that the past data trendis aligned with advertising
expenditures. What issue might exist with this regression analysis?: Autocorrelation
17. A business entrepreneur wishes to predict yearly revenue for potential SubRestaurant sites.
He performs a regression analysis based upon the area's population and business rating. What
statistic indicates the strength of the relationship of population and rating to revenue?: R -
square
18. A researcher is evaluating voter turnout based upon age and location of voting precincts.
Which analysis technique should she use?: Cluster Analysis
19. An entrepreneur is thinking about starting an independent gasoline sta- tion and
considering how large the station should be. The annual return will depend upon the size of
station and a number of marketing factors related tothe oil industry and demand for gasoline.
What analysis technique should be
used to evaluate station size given the uncertainty of oil industry and demandfactors?: Decision
Analysis
20. After traveling down the Mississippi River, barges randomly arrive in New Orleans and
are unloaded on a first-in, first-out basis. Any barges not unloaded on the day of arrival must
wait until the following day incurring additional cost and negatively affecting customer
service. The dock superin-tendent wants to use analytics to support a request for additional
unloadingcrews. What analysis technique should he use?: Simulation
21. A Boston Hallmark store is preparing a budget for the next year and needsto forecast sales.
The store notices variation in sales around holidays. What pattern describes the data to be
forecasted?: Seasonality
22. For companies to attract and retain their best customers they need a complete portrait of
who they are. To develop this portrait companies turnto: Analytics
23. A manufacturer wants to maximize their factory output while specifically minimizing
1. A descriptive graph depicting whether there is a correlation or relationship between two
variables, such as car mileage and resale price would be:: Scat-terplot
2. 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 concludethat the daily sales are driving the number of visits to their
website (or vice versa)?: Is there a causal relationship between sales and site visits?
3. How are z-scores from a population with normal distribution distributed?-
: Normal Distribution with mean 0 standard deviation 1
4. 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 employeeuse to decide between these alternatives?:
Variance
5. A comparison between the effectiveness of online vs. newspaper coupons was conducted
over a 3 month period to see which method brought in greater average revenue per
customer.Which statistic should the pizza manager rec- ommend use to determine promotional
method to use?: T-test
6. Which type of distribution would you expect to see if mean=mode=medi- an?: Normal
distribution
7. Two variables are plotted on a scatterplot and the points on the plot closely follow an upward,
straight line. What is the likely correlation between the twovariables?: Close to 1.0
8. Which of the following statistics are robust to minimize the effect of asingle large outlier?
(More than one answer): Median
Interquartile rangeMode
9. A craftsman builds two kinds of birdhouses. One for bluebirds and one for cardinals. He
knows the amount of labor and the units of lumber that are needed for each birdhouse. The
craftsman has available 60 hours of labor and
120 units of lumber. Which technique should the craftsman use to minimizecost?: Linear
Programming
10. Ski Boards, Inc. wants to enter the market quickly with a new finish on its ski boards. It
has three choices: refurbish the old equipment, make majormodifications or purchase new
equipment. The company has estimated the fixed and variable cost for each option. Which
technique should they use to select the least costly option?: Cross Over
11. Which analysis technique can be used with hypothesis testing when nom-inal or
categorical data is gathered?: Chi-square
, 12. United Motors indicates that gas mileage tests of one of their cars, the Starbird 300, under
city driving conditions has a mean of 30 mph and a medianof 29.9 mph. Which type of
distribution would this testing represent?: Normaldistribution
13. North American Oil Company is attempting to develop a reasonably pricedgasoline that
will deliver improved gasoline mileage. As part of its develop- ment process, the company
would like to compare the effects of three types of gasoline. Which analysis technique should
the company use to compare the performances of each gasoline type?: ANOVA
14. A large manufacturer wants to forecast demand for a piece of pollu-
tion-control equipment. A review of the past 12 months of sales indicates that sales are
increasing. What time series pattern does the sales likely exhibit?: -Trend
15. A car dealership wishes to forecast car sales based upon price discounts and television ads.
What forecasting technique should the dealership use?: -Multiple Regression Analysis
16. A company uses time series analysis to develop its product forecast. Theforecaster uses
simple linear regression but notices that the past data trendis aligned with advertising
expenditures. What issue might exist with this regression analysis?: Autocorrelation
17. A business entrepreneur wishes to predict yearly revenue for potential SubRestaurant sites.
He performs a regression analysis based upon the area's population and business rating. What
statistic indicates the strength of the relationship of population and rating to revenue?: R -
square
18. A researcher is evaluating voter turnout based upon age and location of voting precincts.
Which analysis technique should she use?: Cluster Analysis
19. An entrepreneur is thinking about starting an independent gasoline sta- tion and
considering how large the station should be. The annual return will depend upon the size of
station and a number of marketing factors related tothe oil industry and demand for gasoline.
What analysis technique should be
used to evaluate station size given the uncertainty of oil industry and demandfactors?: Decision
Analysis
20. After traveling down the Mississippi River, barges randomly arrive in New Orleans and
are unloaded on a first-in, first-out basis. Any barges not unloaded on the day of arrival must
wait until the following day incurring additional cost and negatively affecting customer
service. The dock superin-tendent wants to use analytics to support a request for additional
unloadingcrews. What analysis technique should he use?: Simulation
21. A Boston Hallmark store is preparing a budget for the next year and needsto forecast sales.
The store notices variation in sales around holidays. What pattern describes the data to be
forecasted?: Seasonality
22. For companies to attract and retain their best customers they need a complete portrait of
who they are. To develop this portrait companies turnto: Analytics
23. A manufacturer wants to maximize their factory output while specifically minimizing
