Table 2.

Comparison of weighted mean values between the case using Gyeonggi-do data from users having 1,000 or more observations and applying a linear regression analysis by data source (AWS or smartphone) and the case using Gyeonggi-do data from users having 1,000 or more observations and applying a linear regression analysis with the additional classification into daytime and nighttime.

Category	Weighted mean MAE	Weighted mean RMSE
Classified by data source (AWS or smartphone)	0.508	1.051
Classified by data source
Daytime	0.589	0.905
Nighttime	0.286	0.583

MAE: mean absolute error; RMSE: root-mean-squared error.