Regarding the binary variables not reported above, 336 of the 364 day-of-the-year coefficients are statistically significant, while 22 of the 23 hour-of-the-day variables are statistically significant. Only three of the nine solar angle coefficients are statistically significant. Concerning the AR and MA terms, 44 of the 53 AR terms and 31 of the 61 MA terms are statistically different from zero. Both of the ARCH terms are statistically significant. Only one of the three ARCH-in-Mean terms is statistically significant. Regarding the variables that model the heteroskedasticity in the conditional variance, 298 of the 429 variables are statistically different from zero.