Table 4: Probability Density Functions for the NREL January Data Set, given by hour.

Hour	Mean	σ/S	Distribution	R2
0	-0.0238	0.0242	Logistic	0.9294
1	-0.0235	0.0255	Logistic	0.9127
2	-0.0202	0.0230	Logistic	0.8741
3	-0.0191	0.0257	Logistic	0.8533
4	-0.0248	0.0238	Logistic	0.9461
5	-0.0190	0.0251	Logistic	0.7841
6	-0.0214	0.0208	Logistic	0.9665
7	-0.0176	0.0197	Logistic	0.8839
8	-0.0108	0.0138	Logistic	0.8692
9	0.0305	0.0400	Normal	0.9409
10	0.0544	0.0571	Normal	0.9232
11	0.0794	0.0607	Normal	0.9260
12	0.0877	0.0579	Normal	0.9791
13	0.0720	0.0538	Normal	0.9961
14	0.0516	0.0436	Normal	0.9773
15	0.0120	0.0273	Normal	0.9409
16	-0.0154	0.0319	Logistic	0.8173
17	-0.0164	0.0461	Logistic	0.8999
18	-0.024	0.0384	Logistic	0.9089
19	-0.0205	0.0551	Logistic	0.9010
20	-0.0256	0.0407	Logistic	0.9552
21	-0.0265	0.0376	Logistic	0.9310
22	-0.0225	0.0341	Logistic	0.9207
23	-0.0259	0.0437	Logistic	0.9296