A regression predicting total monthly retail sales of electricity in the United States as a function of population (in millions) has been run on monthly data from January 2002 (month 1) to September 2020 (month 225). The regression report is given below. The variables are retail sales of electricity in millions of kilowatt hours (Electricity_Sales_million_kWh) and population in millions (Population). A "retail sale" of electricity is a sale of kilowatt hours to an end user and not to an intermediary. The regression printout is given below.

Dependent Variable: Electricity_Sales_million_kWh R-Squared Adj.R-Sqr. Std.Err.Reg. Std.Dep.Var. # Fitted # Missing 0.052 0.048 29,772 30,511 225 0 Variable Coefficient Std. Error t-Statistic P-value Lower95% Upper95% Constant 143,181 47,139 3.037 0.003 50,286 236,075 Population 531.780 151.857 3.502 0.001 232.522 831.038 Deg. Source Freedom Sum Squares Mean Square F-Statistic P-value Regression 1 10,869,623,875 10,869,623,875 12.263 0.001 Residual 223 197,662,359,811 886,378,295 Total 224 208,531,983,687Dependent Variable: Electricity_Sales_million KWh R-Squared Adj.R-Sqr. Std.Err.Reg. Fitted 0.683 0.676 17,364 225 Variable Coefficient Std. Error t-Statistic Constant 124,464 28, 188 4.415 Covid -27,559 9,069 -3.039 Population 561.234 90.488 6.202 Spring -15,453 3,318 -4.657 Summer 48,308 3,286 14.702 Winter 7,026 3,297 2.131 Deg. P- Source Freedom Sum Squares Mean Square F-Statistic value Regression 5 142,500,617,753 28,500, 123,551 94.524 0.000 Residual 219 66,031,365,933 301,513,086 Total 224 208,531,983,687