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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
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 Sales 12.5 3.7 21.1 60.0 37.6 6.1 140 55 338 994 540 89 126 379 16.0 41.2 Construct a 98% confidence interval for the average value of y for the given data; use x = 20, se - 108.0, and the equation of the regression line, 9 -44.85 + 15.24 %. Do not round the intermediate values. Round your answers to 2 decimal places. Elv20)
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