As part of the advertising campaign, a car dealership runs one or more television commercials during the weekend preceding the sale. Data from a sample of previous sales is shown below: Number of TV Ads Number of Cars Sold 10 115 7 100 15 140 12 120 10 110 16 150 14 140 Manually compute the regression equation. What is ?x?
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First, we need to find the mean of the Number of TV Commercials (x) and the Number of Cars Sold (y). Mean of x: $\bar{x} = \frac{115 + 140 + 120}{3} = \frac{375}{3} = 125$ Mean of y: $\bar{y} = \frac{115 + 140 + 120}{3} = \frac{375}{3} = 125$ Show more…
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