Question: 11. Let's say there is a simple regression equation where X is the independent variable. Another independent variable (let's call it Z) is added. When

11. Let's say there is a simple regression equation where X is the independent variable. Another independent variable (let's call it Z) is added. When will the addition of Z make the coefficient of X smaller, and when will the addition of Z make the coefficient of X larger? Explain as precisely and clearly as possible

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