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In order to determine whether or not the number of automobiles sold per day (Y) is related to price (X 1 in $1,000), and the number of advertising
In order to determine whether or not the number of automobiles sold per day (Y) is related to price (X1 in $1,000), and the number of advertising spots (X2), data were gathered for 7 days. Part of the regression results is shown below.