Question

1. For a given time series the PACF and ACF at lag 1 are equal
   1. True
   2. False
2. PACF can be used full for determining what lags can serve as predictor variable in the regression model
   1. True
   2. False
3. If the histogram and normal quantile plot of the residuals from a time series regression fit show “normality” Then residuals are random overtime
   1. True
   2. False
4. Supposed quarterly sales was fitted with a seasonal model of 459 + 61q4 is an indicator variable for q What is the predicted sales for quarter 1?

Answer 1

1. False, For a given time series the PACF and ACF at lag 1 are not equal

2. True

3. False