Neural Network-Based Model for Predicting Preliminary Construction Cost as Part of Cost Predicting System

Table 2

Minimal, maximal, mean value and standard deviation for the numerical variables (predictors and target).

Continuous variables
Variable	Rows	Minimum	Maximum	Mean	Std. dev.
ln (planned costs, €)	116	9.05358	18.36511	13.27770	2.06661
ln (real costs, €)	116	9.09459	18.51599	13.35837	2.11371
ln (planned time, days)	116	2.70805	6.81619	5.07076	1.04090
ln (real time, days)	116	2.70805	7.50934	5.14528	1.063