WGU C957 CERTIFICATION SCRIPT
QUESTIONS WITH SOLUTIONS GRADED
◍ Logistic function.
Answer: A function that produces an s-shaped curve and contains two
asymptotes
◍ Extrapolation value.
Answer: a prediction that is outside the original range of data
◍ Multivariate.
Answer: involving more than two variables
◍ Which choice is a quantitative variable? A. S, representing the number of
regular weekly shipping deliveries your company's trucks make B. P,
representing the monthly profit based on the number of customers who
needed plumbing services C. R, representing the monthly rent for your
company's office building D. M, representing the federal minimum wage.
Answer: B
◍ A scientist found a sample of carbon-14 and knows the graph below models
the exponential decay of carbon-14, where t is time measured in years and y
is the amount of carbon-14 left in the sample in grams.What would the
average rate of change over the time interval of t = 100 to t = 700 represent,
and would that rate be positive or negative?.
Answer: It represents the annual change in the number of grams of
carbon-14 between 100 and 700 years. The rate is negative.
◍ qualitative variable.
Answer: A variable that is not numeric; also called a categorical variable, a
qualitative variable describes data that fits into categories
◍ Which choice is a variable? A.The operating system on your phone B.The
, amount a babysitter charges per hour C.The name of the largest mountain
range in the United States D.The colors and styles of your shoes.
Answer: D
◍ Data regression.
Answer: The process of examining data points to determine a valid equation.
"Regression" refers to bringing different data points down toward a normal
average- "regressing" them
◍ Extrapolate of moderate model r2 value.
Answer: 25 percent of x values up and down
◍ Concave down.
Answer: upside down U/ increases slower and slower and deacreases faster
and faster
◍ When is the SOME-V Mnemonic used?.
Answer: When evaluating a regression model
◍ Concave up.
Answer: U shaped/ decreases slower and slower then increases faster and
faster
◍ explanatory variable.
Answer: A variable that, as it changes, affects another variable (called the
response variable); for example, as a person pumps more gas into a car's
tank(the explanatory variable), the cost of the purchase rises (the response
variable)
◍ When should an outlier be excluded from a graph?.
Answer: misleading representationirrelevancedata integrity
◍ The function table below shows a company's revenue function (R) and
expense function (E) for each month. In the second row, R(1) is the revenue
total for January, and E(1) is the expense total for January.Which conclusion
can be made about this function table?.
Answer: The highest profit occurred during October.
QUESTIONS WITH SOLUTIONS GRADED
◍ Logistic function.
Answer: A function that produces an s-shaped curve and contains two
asymptotes
◍ Extrapolation value.
Answer: a prediction that is outside the original range of data
◍ Multivariate.
Answer: involving more than two variables
◍ Which choice is a quantitative variable? A. S, representing the number of
regular weekly shipping deliveries your company's trucks make B. P,
representing the monthly profit based on the number of customers who
needed plumbing services C. R, representing the monthly rent for your
company's office building D. M, representing the federal minimum wage.
Answer: B
◍ A scientist found a sample of carbon-14 and knows the graph below models
the exponential decay of carbon-14, where t is time measured in years and y
is the amount of carbon-14 left in the sample in grams.What would the
average rate of change over the time interval of t = 100 to t = 700 represent,
and would that rate be positive or negative?.
Answer: It represents the annual change in the number of grams of
carbon-14 between 100 and 700 years. The rate is negative.
◍ qualitative variable.
Answer: A variable that is not numeric; also called a categorical variable, a
qualitative variable describes data that fits into categories
◍ Which choice is a variable? A.The operating system on your phone B.The
, amount a babysitter charges per hour C.The name of the largest mountain
range in the United States D.The colors and styles of your shoes.
Answer: D
◍ Data regression.
Answer: The process of examining data points to determine a valid equation.
"Regression" refers to bringing different data points down toward a normal
average- "regressing" them
◍ Extrapolate of moderate model r2 value.
Answer: 25 percent of x values up and down
◍ Concave down.
Answer: upside down U/ increases slower and slower and deacreases faster
and faster
◍ When is the SOME-V Mnemonic used?.
Answer: When evaluating a regression model
◍ Concave up.
Answer: U shaped/ decreases slower and slower then increases faster and
faster
◍ explanatory variable.
Answer: A variable that, as it changes, affects another variable (called the
response variable); for example, as a person pumps more gas into a car's
tank(the explanatory variable), the cost of the purchase rises (the response
variable)
◍ When should an outlier be excluded from a graph?.
Answer: misleading representationirrelevancedata integrity
◍ The function table below shows a company's revenue function (R) and
expense function (E) for each month. In the second row, R(1) is the revenue
total for January, and E(1) is the expense total for January.Which conclusion
can be made about this function table?.
Answer: The highest profit occurred during October.
