Time Series Analysis - Study Mode
[#1] Which statistical test is commonly used to assess the independence of residuals in a time series model?
Correct Answer
(B) Ljung-Box test
[#2] In time series analysis, what does "stationarity" refer to?
Correct Answer
(A) A constant mean and variance
[#3] What is the primary objective of "seasonal differencing" in time series analysis?
Correct Answer
(C) To make the data stationary
[#4] Which statistical method is commonly used to test the stationarity of a time series data set?
Correct Answer
(A) Augmented Dickey-Fuller test
(E) Augmented Dickey-Fuller test
[#5] In time series analysis, what does the "autoregressive integrated moving average" (ARIMA) model combine?
Correct Answer
(A) Autoregressive and moving average components