Equation: \( Weight(grams) = 42.2837+0.4632*Production time (mins) \)

c)(i). State and interpret the estimated y-intercept. Is it meaningful? (ii). How valid is this estimate? SUMMARY OUTPUT Regression Statistics Multiple R 0.747682802 R Square 0.559029572 Adjusted R Square 0.558144089 Standard Error 0.060009011 Observations 500 ANOVA df SS MS F Significance F Regression 1 2.273461464 2.273461 631.3274 1.37E-90 Residual 498 1.793 338536 0.003601 Total 499 4.0668 Coefficients Standard Error t Stat P-value Lower 95% Upper 95% Lower 95.0% Upper 95.0% Intercept 42.2837226 0.307271401 137.6103 0 41.68001 42.88743 41.68001 42.88743 Production time (mins) 0.463151414 0.018432985 25.12623 1.37E-90 0.426935 0.499367 0.426935 0.499367