A regression model relating x, number of sales persons at a branch office, to y, annual sales at the office ($1000s), has been developed.

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A regression model relating x, number of sales persons at a branch office, to y, annual sales at the office ($1000s), has been developed. The computer output from a regression analysis of the data follows. The regression equation is ŷ = 80.0 + 50.0X

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