Developing an Integrative Data Intelligence Model for Construction Cost Estimation

Table 2

Descriptive measures of the cost data for the testing phase.

	Minimum	Maximum	Mean	Median	Std. deviation	Skewness	Kurtosis
Ground floor area (m^2)	239	3940	1490	1394	882.414	0.991	0.713
Total floor area (m^2)	344	9800	4086	3840	2692.433	0.384	−1.068
Floor number	1	6	3.222	3	1.625	0.483	−1.089
Elevator number	0	4	1.37	1	1.182	0.501	−0.936
Footing type (raft = 1; separated = 2)	—	—	—	—	—	—	—
Inflation (%)	0.1	7.5	3.319	2.1	2.674	0.297	−1.474
Duration (days)	150	787	404.7	364	177.036	0.468	−0.770
Cost ($)	160147	6104878	2571431	2215402	1940152	0.409	−1.345