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11.90 FORECASTING MOVIE REVENUES WITH TWEETS TWITTER. Refer to the IEEE International Conference on Web Intelligence and Intelligent Agent Technology (2010) study of how social media (e.g., Twitter.com) may influence the products consumers buy, Exercise 11.2710 (p. 642). Recall that opening weekend box-office revenue (in mylions of dollars) and tweet rate ( average number of tweets referring to the movie per hour) were collected for a sample of 23 recent movies. You fit a simple linear regression model, with y = revenue and z = tweet rate. The results are shown in the XLSTAT printout above. a. Evaluate the adequacy of the simple linear regression model. Do you recommend using the model for prediction purposes? b. Find a 95% prediction interval for the revenue (y) of a movie with a tweet rate (x) of 250 tweets per hour. Give a practical interpretation of the interval