Category: Uncategorized

Between competing ARIMA models, the one with the lowest variance will have the lowest AIC. 

   Considering the above ACF plot, which of the following statements is correct?

If variance of the time series is increasing in t, taking the inverse of the response may be appropriate.

Considering the following model output, how many parameters are statistically significant at a 1% confidence level (critical point equal to 2.56)?

Maximum-Likelihood esitmators are always preferred over Methods of Moments (MoM) estimators. 

Which of the following is a parametric trend estimation model?

Which measure of model performance allows for a unitless (scale-free) comparison?

Using the iterative selection via AIC reduction approach, you find the best orders for the following stock prices: AAPL, GOOG, FB, TSLA (given below in order). Which model has the lowest degrees of freedom?

It is possible to include multiple seasonality components (e.g both day and month) when using ANOVA modeling.

Variance of Xt = 2Xt-1 + Zt is infinite.