Unsupervised outlier detection for time-series data of indoor air quality using LSTM autoencoder with ensemble method

Journal of Big Data

Table 2 Augmented Dicky–Fuller test at various levels

Type	Temperature	Humidity	TVOC	CO	CO₂	CH₂O	PM10
ADF test	−5.336495	−4.812659	−5.780521	−12.57404	−6.217924	−8.065061	−5.708918
Critical Value (1%)	−3.959300	−3.959301	−3.959301	−3.959301	−3.959301	−3.959301	−3.959301
Critical Value (5%)	−3.410747	−3.410748	−3.410748	−3.410748	−3.410748	−3.410748	−3.410748
Critical Value (10%)	−3.127201	−3.127202	−3.127202	−3.127202	−3.127202	−3.127202	−3.127202
p-value	0.000048	0.000445	0.000006	5.1291e-20	7.5653e-07	5.0535e-11	0.000009