-R7 5 In a sample of size 25, you calculate a sample autocorrelation to be 0.35. You need to know if this autocorrelation is statistically significant at the 5% level of significance. Is it? (Keep in mind that the standard error of a sample autocorrelation is 1/(N^0.5), where N is the sample size. O Yes, the autocorrelation is statistically significant at the 5% level (t-stat must be 1.96) O No, the autocorrelation is significant at the 10% level (t-stat must be 1.645), but not at the 5% level -RA 6 You have 100 observations of a time series, y. You run a regression of y on the first ten lags of itself. You examine the results, which show that the coefficient on the tenth lag is 0.35 and it is statistically significant at the 5% level of significance. From this we can conclude? That the tenth autocorrelation is 0.35 and is significant O That the tenth autocorrelation is 0.35 and we cannot determine its significance O That the tenth partial autocorrelation is 0.35 and is significant O That the tenth partial autocorrelation is 0.35 and we cannot determine its significance