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Parallel plane interpretation

The coefficients from our parallel planes model is shown below.

Call:
lm(formula = totalPr ~ duration + startPr + cond, data = mario_kart)

Coefficients:
(Intercept)     duration      startPr     condUsed  
    53.3448      -0.6560       0.1982      -8.9493  

Choose the right interpretation of \(\beta_3\) (the coefficient on condUsed):

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