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Which of the following statements regarding a time series technique is true? - Answer-
Time series techniques focus on the historical behavior of some outcome of interest to
predict its future behavior.
Which time series technique predicts a future value by combining the previous
prediction and some portion of the error in the prediction? - Answer- Simple exponential
smoothing
Which of the following correlation coefficient values represents the strongest positive
correlation between two factors in a data set? - Answer- r-=0.931
It is NOT possible for a forecast to be both responsive and inaccurate. - Answer- False
In a time series, what is a black swan? - Answer- a particularly high-impact incident of
extreme consequence that is unexpected or considered highly improbable
Calculating a regression equation for a given set of data identifies the specific values of
____ - Answer- the slope and intercept
Averaging forecast errors over time results in the performance measure known as *****?
- Answer- mean error
What is the ME for the forecast errors of 5, 10, 0, and -3? - Answer- 3
one-time shocks to a time series from a distinctly external influence, such as a sudden
dip in consumer sales after a disruptive event, are called ____ variations - Answer-
exogenous
Several forecasting methods rely on insights from a group of people, but which method
does NOT have the group discuss their opinions? - Answer- Delphi Groups
Which of the following forecasting measures calculates the average of the absolute
values of a set of forecast errors? - Answer- MAD
The alpha value (o) in the exponential smoothing formula is known as the - Answer-
smoothing constant