A study was designed to examine the relationship between the TIME (in days) to c

Question

A study was designed to examine the relationship between the TIME (in days) to complete a construction project and SUBCONTRACT, the number of sub-contractors involved. The regression results are given below.
What is the slope coefficient for SUBCONTRACT from this model?

B.-12.321 C.32.286 D.6.439 Summary of Fit RSquare 0.713 RSquareAdj 0.691 Root Mean Square Emor 14.232 Mean of Response 38.333 Observations (or Sum Wgts) 15.000 Analysis of Variance DF Sum of Squares Source Mean Square Mode 6540.018 6540.018 202.563 Error 13 2633.316 C. Total 9173.333 14 Lack of Fit Sum of Squares Source DF Mean Square 281.414 Lack Of Fit 2251.3157 382.0000 Pure Error 76.400 Total Error 2633.3157 13 Parameter Estimates Estimate Std Error Term t Ratio Intercept 12.321 9.642 28 1.133 Subcontract 6.439 5.68 F Ratio 32.286 Prob> F F 0.0836 Prob t 0.2237

Explanation / Answer

from above given regression output estimation for slope has been given as 6.439

hence option D

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