16. [2 pt] If we use model A for prediction, what is the point estimate for the revenue of a concert that has an attendance of 35,000 people? Point estimate: 17. [2 pt] What is an approximate 95% prediction interval for the concert revenue listed in the previous question? (Hint: Use the approximation factor for prediction interval we discussed in class.) Approximate 95% prediction interval: 18. [2 pt] Did regression model A provide a good fit? Select the statement that best answers the question. (a) Yes, because we can reject the null hypothesis that Bf is greater than zero. (b) No, because the standard error of the regression is too low. (c) Yes, because intercept of the regression is positive. (d) Yes, because the model can explain 44% of the variability in revenue. 19. [2 pt] Compute the sample correlation coefficient between revenue and rank on Billboard chart using the regression output of Model B. Sample correlation coefficient