WGU C207 UPDATED ACTUAL Exam
Questions and CORRECT Answers
+\- 1 - CORRECT ANSWER 68%
+\-2 - CORRECT ANSWER 95.4%
+/-3 - CORRECT ANSWER 99.7%
histogram - CORRECT ANSWER the best tool for visualizing the distribution of a single
quantitative variable (ex. number of weeks)
scatter plot - CORRECT ANSWER best for showing relationships between 2 numeric
variables
pie chart - CORRECT ANSWER used for showing proportions of categories
box plot - CORRECT ANSWER used for showing spread and outliers but less detailed about
the full distribution shape than a histogram
crossover analysis - CORRECT ANSWER helps compare multiple cost options by identifying
the quantity or volume at which one option becomes cheaper than the other , use when trying to
decide which option costs less at different levels of outputs
break-even analysis - CORRECT ANSWER tells when total revenue =total cost
linear regression - CORRECT ANSWER used to model/predict relationships
, normal distribution - CORRECT ANSWER when the mean is almost equal to the mode and
median
Autocorrelation - CORRECT ANSWER also called serial correlation , occurs when residuals
(errors) in a time series regression are correlated with each other
r-squared - CORRECT ANSWER indicates the strength of the relationship between
independent variables and dependent variables ranges from 0-1
f-test - CORRECT ANSWER tests overall significance of the model
p-value - CORRECT ANSWER tests individual coefficient significance , tells if a result is
statistically significant
z score - CORRECT ANSWER measures how far a value is from the mean , allows fair
comparisons across subjects
decision analysis - CORRECT ANSWER used when you must make a clear choice under
uncertainty and risk and when you need to evaluate different strategies with varying returns
(example small gas station large gas station)
time series analysis - CORRECT ANSWER used for forecasting based on past trends over
time
regression analysis - CORRECT ANSWER explains relationships between variables
flow chart - CORRECT ANSWER helps identify delays and unnecessary steps in work flows
, ideal for studying and improving a process provides a clear visual of each step and helps spot
inefficiencies
histogram - CORRECT ANSWER useful for visualizing data distributions
Questions and CORRECT Answers
+\- 1 - CORRECT ANSWER 68%
+\-2 - CORRECT ANSWER 95.4%
+/-3 - CORRECT ANSWER 99.7%
histogram - CORRECT ANSWER the best tool for visualizing the distribution of a single
quantitative variable (ex. number of weeks)
scatter plot - CORRECT ANSWER best for showing relationships between 2 numeric
variables
pie chart - CORRECT ANSWER used for showing proportions of categories
box plot - CORRECT ANSWER used for showing spread and outliers but less detailed about
the full distribution shape than a histogram
crossover analysis - CORRECT ANSWER helps compare multiple cost options by identifying
the quantity or volume at which one option becomes cheaper than the other , use when trying to
decide which option costs less at different levels of outputs
break-even analysis - CORRECT ANSWER tells when total revenue =total cost
linear regression - CORRECT ANSWER used to model/predict relationships
, normal distribution - CORRECT ANSWER when the mean is almost equal to the mode and
median
Autocorrelation - CORRECT ANSWER also called serial correlation , occurs when residuals
(errors) in a time series regression are correlated with each other
r-squared - CORRECT ANSWER indicates the strength of the relationship between
independent variables and dependent variables ranges from 0-1
f-test - CORRECT ANSWER tests overall significance of the model
p-value - CORRECT ANSWER tests individual coefficient significance , tells if a result is
statistically significant
z score - CORRECT ANSWER measures how far a value is from the mean , allows fair
comparisons across subjects
decision analysis - CORRECT ANSWER used when you must make a clear choice under
uncertainty and risk and when you need to evaluate different strategies with varying returns
(example small gas station large gas station)
time series analysis - CORRECT ANSWER used for forecasting based on past trends over
time
regression analysis - CORRECT ANSWER explains relationships between variables
flow chart - CORRECT ANSWER helps identify delays and unnecessary steps in work flows
, ideal for studying and improving a process provides a clear visual of each step and helps spot
inefficiencies
histogram - CORRECT ANSWER useful for visualizing data distributions
