Suppose that you have generated three alternative multiple regression equations to explain the variation in a particular dependent variable. The regression output for each equation can be summarized as follows:
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Equation 1 Equation 2 Equation 3
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No. of Xs
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4
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6
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9
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R2
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0.76
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0.77
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0.79
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Adjusted R2
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0.75
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0.74
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0.73
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Which of these equations would you select as "best"? Explain your choice.