Significant auto-correlation at lag 1 must mean that observations 1 and 2 are correlated. True False Reset Selection Question 2 of 14 1 Points In a dataset with 81 observations, how many pairs of data are there at lag 3? A. 3 B. 78 C. 79 D. 80 Reset Selection Question 3 of 14 1 Points The Autocorrelation Function (ACF) graphically shows the amount of correlation present within the dataset at each lag. True False Reset Selection Question 4 of 14 1 Points The value of the Partial Autocorrelation Function at lag 5 is a measure of the autocorrelation of the first 5 observations. True False Reset Selection Question 5 of 14 1 Points Which of the following is NOT a reason to declare the dataset "not stationary"? A. The dataset exhibits a trend. B. The dataset exhibits significant autocorrelation (as per the ACF) at lags 20-25. C. The dataset exhibits significant autocorrelation (as per the ACF) at lags 1 and 2. D. The dataset exhibits seasonal behavior. Reset Selection Question 6 of 14 1 Points If a dataset is uncorrelated, it MUST be stationary. True False Reset Selection Question 7 of 14 1 Points Suppose the ACF for your