A corporation owns several companies. The strategic planner for the corporation believes dollars spent on advertising can to some extent be a predictor of total sales dollars. As an aid in long-term planning, she gathers the following sales and advertising information from several of the companies for 2009 ($ millions). Advertising (x) Sales (y) 12.5 133 3.7 55 20.5 338 60.0 994 37.6 530 6.1 89 15.9 126 41.2 379 a. Construct a 98% confidence interval for the average value of y for the given data; use x = 20, se = 108.7, and the equation of the regression line, = -44.50 + 15.19 x. (Do not round the intermediate values. Round your answers to 2 decimal places, e.g. 0.75.) s Elyzo) s