Ononot — In a regression analysis, the independent variable x is a bi

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Linear Modelingmedium

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In a regression analysis, the independent variable $x$ is a binary dummy variable coded as $1$ for patients who received a treatment and $0$ for patients in the control group. The fitted model is $\hat{y} = 12.4 + 4.2x$ , where $y$ is the change in blood pressure. How should the slope coefficient $4.2$ be interpreted?