Which Way Did the Line Miss? — easy Correlation & Regression problem | Incognition

Which Way Did the Line Miss?

Correlation & RegressionEasy+10 XP+10

Which Way Did the Line Miss?

A simple linear regression of monthly water usage $y$ on household size $x$ produced the fitted line

$\hat{y} = 2.5 + 1.4x$

One household in the dataset has $x = 4$ and an observed value of $y = 7.3$ .

What is the residual for this household?

Residual Plots and Model Evaluation

OLS Regression Fit

Residual Plot (e_i vs x_i)

MSE (Mean Squared Error): 0.380

RMSE (Root MSE): 0.616

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