Question 7 The following plots have been obtained for a time series. a) Suggest an appropriate ARIMA model based on the below plots. 120- 90- 60- 30- act 1980 Jan 0.2- 0.1% 0.0 -0.14 1990 Jan lag (1M) 2000 Jan Month pact 0.2- 17.4 0.1- 0.0 -0.1 2010 Jan m lag (1M) .model sigma2 log_lik AIC AICe BIC ar roots ## ## 1 arima 011 ## 2 arima110 ## 3 auto b) The following ARIMA output has been obtained from R. Based on this output, explain which model would you recommend for forecasting? 2020 Jan ma_roots 17.1 -1393. 2787. 2787. 2806. 17.1 -1399. 2780. 2780. 2815. -1392. 2788. 2788. 2807. c) If your selected model in part b) above has a p-value of 0.900 in the Ljung-Box test, would you recommend using this model? Explain why or why not.
Question 7 The following plots have been obtained for a time series. a) Suggest an appropriate ARIMA model based on the below plots. 120- 90- 60- 30- act 1980 Jan 0.2- 0.1% 0.0 -0.14 1990 Jan lag (1M) 2000 Jan Month pact 0.2- 17.4 0.1- 0.0 -0.1 2010 Jan m lag (1M) .model sigma2 log_lik AIC AICe BIC ar roots ## ## 1 arima 011 ## 2 arima110 ## 3 auto b) The following ARIMA output has been obtained from R. Based on this output, explain which model would you recommend for forecasting? 2020 Jan ma_roots 17.1 -1393. 2787. 2787. 2806. 17.1 -1399. 2780. 2780. 2815. -1392. 2788. 2788. 2807. c) If your selected model in part b) above has a p-value of 0.900 in the Ljung-Box test, would you recommend using this model? Explain why or why not.
Chapter4: Linear Functions
Section4.3: Fitting Linear Models To Data
Problem 24SE: Table 6 shows the year and the number ofpeople unemployed in a particular city for several years....
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