he following data are available for a simple linear regression analysis attempting to link hours of training (x) to hourly output (y). Relationship between hours trained and hourly output Training (x) Output (y) 5 12 4 15 8 24 2 9 In applying the least squares criterion, the slope (b) and the intercept (a) for the best-fitting line are b = 2.4 and a = 3.6. You are to set up a hypothesis test to determine whether you can reject the hypothesis that the population slope, , is 0 at the 5% significance level. Report the value of the appropriate sample test statistic, tstat. Group of answer choices 3.90 3.46 8.29 6.86