Ononot — For a simple linear regression Y = \beta0 + \beta1 X + \epsi

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Linear Modelinghard

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For a simple linear regression $Y = \beta_0 + \beta_1 X + \epsilon$ with $n=25$ observations, if the residual standard error is $s_e = 4.0$ and $\sum (X_i - \bar{X})^2 = 160$ , what is the standard error of the slope estimator $SE(\hat{\beta}_1)$ ?