After estimating a trend model for annual time-series data,you obtain the following residual plot against time. 
The problem with your model is that
A) the cyclical component has not been accounted for.
B) the seasonal component has not been accounted for.
C) the irregular component has not been accounted for.
D) the trend component has not been accounted for.
Correct Answer:
Verified
Q9: The cyclical component of a time series
A)
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The number of cases of
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Q16: The annual multiplicative time-series model does not
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A)
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