The following table presents data concerning the sales of minivans and minivan tires for 10 years. It

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The following table presents data concerning the sales of minivans and minivan tires for 10 years. It is believed that the demand for minivan replacement tires is highly correlated with the sales figures of minivans for the previous years. Based on these data which is a better predictor of minivan tire sales—

sales of minivans three years prior or four years prior?

Year t Minivan Sales in Year t (in millions)
Minivan Tire Sales yt in Year t (in millions)
1 10 4 2 12 6 3 11 7 4 9 5 5 10 8 6 12 7 7 10 5 8 9 7 9 8 8 10 7 6

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