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Autocorrelation in the residuals of a time series model refers to the correlation of the residuals (errors) at different time points. If there is high autocorrelation, it suggests that the residuals are not independent of each other and that the model has not adequately captured important patterns or information from the data. A good time series model, such as ARIMA, should ideally result in residuals with no significant autocorrelation, indicating that the model has accounted for all the systematic information in the data. High autocorrelation in residuals is a sign that the model should be re-evaluated or refined to capture those patterns. Why Other Options Are Incorrect: • A: High autocorrelation in residuals suggests that important patterns have not been captured, not that the model is perfect. • C: Autocorrelation is relevant for all types of time series data, including stationary data, as it helps ensure that the model is correctly specified. • D: Autocorrelation is crucial for models like ARIMA because it informs the structure of the model. Ignoring it can result in poor forecasting performance. • E: High autocorrelation does not necessarily lead to overfitting; it generally signals that the model is missing key information, not that it is overfitting.
In each of the following question below are given some statements followed by some conclusions. Taking the given statements to be true even if they se...
Statements:
Only a few Beautiful is Intelligent.
Only a few Smart is Beautiful.
No Smart is Honest.
Conclusion:
I. No...
Statements: All covers are glasses.
Some caps are covers.
No cup is a cap.
Conclusions: I. Some cups are not...
In the following question below are given some statements followed by some conclusions based on those statements. Taking the given statements to be tru...
Statements:
All Water are Milk
Some Lassi are Milk
All Tea are Water
Only a few Coke are Lassi
Conclusi...
Statements : All one are two.
All three are two.
...
Statements:
Only subjects is notes.
Some subjects are topic.
Some topic are papers.
No topic is index.
Conclusions
Statement : 75 % Minutes are Watch
Few Watch are Hour
All Hour are Month
Conclusion
I. Mostly Minutes are hour
...Statements:
Some bangles are necklaces.
No necklace is a ring.
Only a few rings are anklets.
All anklets are earrings.
<...Statement:
I) No A is B
II) No B is C
III) Some D are C
IV) All D are E
Conclusion:
I) Some E are not D
II) Some A are C
III) No C is A