Table 3.

Summary Statistics Comparing Modeled to Measured ln(PNC) at All Homes Combined

	Chelsea		Boston
statistica	Mobile-C (n = 8469)	Hybrid-C (n = 8805)	Mobile-B (n = 10 162)	Hybrid-B (n = 10 161)
Pearson correlation	0.51	0.73	0.47	0.74
Spearman correlation	0.50	0.73	0.48	0.73
mean differenceb	0.37	0.30	0.24	0.56
standard deviation of mean difference	1.22	1.04	1.31	0.90
RMSE	0.72	0.61	0.71	0.72

^aStatistics are based on all study-area homes grouped into one large data set.

^bThe mean difference between modeled and measured PNC at all homes combined.