Predict the number of worker hours needed to erect given boiler drums using all

Question

Predict the number of worker hours needed to erect given boiler drums using all available explanatory variables.

SUMMARY OUTPUT Regression statistics Multiple R 0.950242 0.90296 R Square R 0.890438 Adjusted Square Standard Error 894.6032 Observations 36 ANOVA gnificance F Regression 4 2.31E+08 57713714 72.11376 2.98E-15 Residual 31 24809761 800314.9 Total 35 2.56E+08 Coefficientsandard Err t Stat P-value Lower 95%Upper S5%ower 95.03 pper95.0% 1690.08 1247.387 -1.3549 0.185243 -4234.14 853.9829 -4234.14 853.9829 Intercept Boiler Capacity 0.008749 0.000903 9.683809 6.86E-11 0.006906 0.010592 0.006906 0.010592 1.926477 0.648907 2.968804 0.005723 0.603023 3.249932 0.603023 3.249932 Design Pressure Drum Type Mud -2093.35 305.6337 -6.84922 1.12E-07 -2716.7 -1470.01 -2716.7 -1470.01 Boiler Type Industrial 3444.255 911.7283 3.77772 0.000675 1584.773 5303.737 1584.773 5303.737 all significant

Explanation / Answer

Here the co-efficients of all the independent variables are significant, hence we have to incorporate all the independent variables in the model. The intercept is not significant here.

Hence, the number of worker hours needed to erect given boiler drums = 0.008749 * Boiler Capacity + 1.926477 * Design Pressure - 2093.35 * Drum Type - Mud + 3444.255 * Boiler Type - Industrial.

Given the values of the independent variables, we can predict the number of worker hours needed to erect given boiler drums.

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