71. In time series analysis, what is the primary objective of "stationarizing" the data? A. To identify seasonality in the data B. To remove seasonality from the data C. To make the data stationary D. To assess the model's goodness of fit Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
72. What is the primary purpose of "out-of-sample testing" in time series forecasting? A. To identify seasonality in the data B. To evaluate the accuracy of forecasts C. To remove outliers from the data D. To test for autocorrelation in residuals Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
73. Which statistical method is used to determine whether there is a significant difference between observed and forecasted values in time series analysis? A. Augmented Dickey-Fuller test B. Ljung-Box test C. Granger causality test D. Forecast Error Testing Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
74. In time series analysis, what is the primary purpose of "forecast error variance decomposition"? A. To identify seasonality in the data B. To test for autocorrelation in residuals C. To evaluate the accuracy of forecasts D. To decompose forecast error sources Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
75. What does the term "holt-winters" refer to in time series analysis? A. A method for identifying seasonality B. A method for forecasting with trend and seasonality C. A method for removing outliers D. A method for residual analysis Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
