MCQOPTIONS
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				| 1. | 
                                    Empirical estimation models are typically based on | 
                            
| A. | expert judgment based on past project experiences | 
| B. | refinement of current project estimation | 
| C. | regression models derived from historical project data | 
| D. | trial and error determination of the parameters and coefficients | 
| Answer» D. trial and error determination of the parameters and coefficients | |