Developing an Integrative Data Intelligence Model for Construction Cost Estimation

Table 1

Descriptive measures of the cost data for the training phase.

	Minimum	Maximum	Mean	Median	Std. deviation	Skewness	Kurtosis
Ground floor area (m^2)	200	5320	1622	1370	1196.252	1.127	0.466
Total floor area (m^2)	355	9088	3135	2525	2214.788	1.079	0.466
Floor number	1	6	2.762	2	1.711	0.651	−1.052
Elevator number	0	4	0.794	0	1.002	1.073	0.349
Footing type (raft = 1; separated = 2)	—	—	—	—	—	—	—
Inflation (%)	0.1	7.5	2.484	1.8	2.161	0.775	−0.656
Duration (days)	122	731	357.6	348	137.171	0.715	0.652
Cost ($)	26756	6451519	1975260	1321630	1623076	0.903	−0.312