Question: =+a. Fitting the model with the four independent variables as predictors resulted in the following Minitab output. Does the fitted model appear to be useful?

=+a. Fitting the model with the four independent variables as predictors resulted in the following Minitab output. Does the fitted model appear to be useful?

The regression equation is durpr = –0.912 + 0.161 formconc

+ 0.220 catratio + 0.0112 temp

+ 0.102 time Predictor Coef StDev T p Constant –0.9122 0.8755 –1.04 0.307 formconc 0.16073 0.06617 2.43 0.023 catratio 0.21978 0.03406 6.45 0.000

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