. Author manuscript; available in PMC: 2020 Nov 5.

Published in final edited form as: Environ Sci Technol. 2019 Oct 10;53(21):12793–12802. doi: 10.1021/acs.est.9b03957

Table 5:

External validation benchmark against ECOSAR.

	Model Used	Test Set Size	Train Set Size	R²	RMSEⁱ	σ_E lower	σ_Eⁱⁱ	σ_E upper	Percent \|Error\| < 1
LC₅₀	ECOSAR	532		0.23	1.07	1.01	1.07	1.14	83.6%
LC₅₀	Fast Model	532	2124	0.61	0.76	0.72	0.76	0.81	84.8%
Chronic MATC	ECOSAR	18		0.69	0.62	0.46	0.61	0.91	94.4%
Chronic MATC	Fast Model	18	1908	0.78	0.52	0.40	0.54	0.80	94.4%
Expanded chronic MATC	ECOSAR	45		−0.60	1.50	1.24	1.50	1.89	66.7%
Expanded chronic MATC	Fast Model	45	1881	0.43	0.89	0.75	0.90	1.14	80.0%

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RMSE: Root-mean-square error

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σ_E: Standard deviation of error