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Please answer the question below based on pic I have attached. Question 19 (4 points) Which of the following can be used to correct serial

Please answer the question below based on pic I have attached.

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Question 19 (4 points) Which of the following can be used to correct serial correlation in residuals O Check for omitted variables Differenceing O Drop one of the x variables Both A and B Question 20 (4 points) Which of the following are criteria to determine if an ARIMA model is adequate? OMS of residuals The Ljung Box Q statistics (Chi-squared statistics) O The Durbin Watson statistics O Both A and B

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