Question: Question 4 Forecast errors a . are the difference in successive values of a time series b . should be summed to judge the goodness

Question 4
Forecast errors
a. are the difference in successive values of a time series
b. should be summed to judge the goodness of a forecasting model
c. are the differences between actual and forecast values
d. should all be nonnegative
Question 4 Forecast errors a. are the difference in successive values

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